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Search Tip If you want to search Easy questions of Amazon on Array topic then type "amazon easy array" and get the results. You can also search "leetcode medium string" to get all medium difficulty questions on string topic from LeetCode

Difficulty	Question Title	Company Name	Category
	Minimum swaps to make sequences increasing		array
	Sum of nearest smaller and greater number		array
Easy	Check If Two String Arrays are Equivalent Leetcode Solution	Facebook	LeetCode String
Easy	Check Array Formation Through Concatenation Leetcode Solution	Uber	LeetCode Array
Easy	Check If a Word Occurs As a Prefix of Any Word in a Sentence Leetcode Solution	Yelp	LeetCode String
Easy	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	Facebook	LeetCode Array
Easy	Shuffle the Array Leetcode Solution	Adobe Apple Bloomberg Google Microsoft	LeetCode Array
Easy	Final Prices With a Special Discount in a Shop Leetcode Solution		LeetCode Array
Easy	Slowest Key Leetcode Solution	Amazon	LeetCode Array
Medium	3Sum Leetcode Solution	Adobe Amazon Apple Bloomberg Facebook Google Microsoft Oracle Tesla VMware	LeetCode Array
Easy	Get Maximum in Generated Array Leetcode Solution		LeetCode Array
Medium	Insert Interval Leetcode Solution	Amazon Apple Facebook Google LinkedIn Microsoft Oracle ServiceNow Twitter Uber	LeetCode Array
Easy	Root to Leaf path with target sum Leetcode Solutions	Amazon Apple Facebook Microsoft	LeetCode Depth First Search Tree
Easy	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	Amazon Bloomberg Citrix Microsoft Twitter	LeetCode String
Easy	License Key Formatting Leetcode Solution	Capital One Google	LeetCode String
Easy	Split a String in Balanced Strings Leetcode Solution	Bloomberg Walmart Labs	LeetCode String
Easy	Kth Largest Element in a Stream Leetcode Solution	Adobe Amazon Apple Box eBay Facebook Goldman Sachs Google Microsoft Nutanix	LeetCode Design
Easy	Sum of Even Numbers After Queries	Indeed	LeetCode Array
Easy	Remove Linked List Elements Leetcode Solution	Adobe Amazon Apple Bloomberg Capital One Facebook Google Microsoft	LeetCode
Easy	Number Complement Leetcode Solution	Apple	LeetCode
Medium	Combination Sum Leetcode Solution	Adobe Airbnb Amazon Apple Atlassian Bloomberg ByteDance eBay Facebook Goldman Sachs Google LinkedIn Microsoft Oracle Snapchat Square Uber VMware Walmart Labs	LeetCode Array Backtracking
Easy	Minimum Moves to Equal Array Elements Leetcode Solution	Amazon Apple Coursera Factset Indeed JPMorgan Mathworks Microsoft Swiggy	LeetCode
Easy	Isomorphic Strings Leetcode Solution	Adobe Amazon Apple Bloomberg Facebook Google Intel LinkedIn Microsoft Oracle Yahoo	LeetCode String
Easy	Island Perimeter Leetcode Solution	Amazon Bloomberg Facebook Google Microsoft	LeetCode Array
Easy	Available Captures for Rook Leetcode Solution	Square	LeetCode Array
Medium	Minimum Swaps to Make Strings Equal Leetcode Solution	Amazon	LeetCode String
Easy	Decrypt String from Alphabet to Integer Mapping Leetcode Solution	Quip Salesforce	LeetCode String
Easy	Rearrange Spaces Between Words Leetcode Solution	Google	LeetCode String
Easy	Hamming Distance Leetcode Solution	Adobe Amazon Facebook	LeetCode
Medium	Word Search Leetcode Solution	Amazon Apple Bloomberg ByteDance Cisco eBay Expedia Facebook Intuit Microsoft Oracle Pinterest ServiceNow Snapchat	LeetCode Backtracking Matrix
Easy	Min Stack Leetcode Solution	Amazon Apple Bloomberg Capital One Microsoft Oracle	LeetCode Design Stack
Easy	Maximum Subarray Leetcode Solution	Adobe Amazon Apple Bloomberg ByteDance Cisco Facebook Goldman Sachs Google JPMorgan LinkedIn Microsoft Oracle PayPal Paytm Uber	LeetCode Array Dynamic Programming
Easy	Sort Array by Increasing Frequency Leetcode Solution	eBay Twilio	LeetCode Array Sorting
Medium	Check If a String Can Break Another String Leetcode Solution		LeetCode Sorting String
Easy	Number of Students Doing Homework at a Given Time Leetcode Solution		LeetCode Array
Medium	Count Good Nodes in Binary Tree Leetcode Solution	Amazon Microsoft	LeetCode Depth First Search
Easy	Lucky Numbers in a Matrix Leetcode Solution	Oracle	LeetCode Array
Easy	Largest Substring Between Two Equal Characters Leetcode Solution		LeetCode String
Easy	Build an Array With Stack Operations Leetcode Solution	Google	LeetCode Stack
Easy	Destination City Leetcode Solution	PayPal Yelp	LeetCode String
Easy	Maximum Score After Splitting a String Leetcode Solution	Google	LeetCode String
Easy	Moving Stones Until Consecutive Leetcode Solution	Facebook	LeetCode
Easy	Thousand Separator Leetcode Solution		LeetCode String
Easy	Find the Town Judge Leetcode Solution	Amazon	LeetCode Graph
Easy	Factorial Trailing Zeroes Leetcode Solution	Bloomberg	LeetCode
Easy	Find the Distance Value Between Two Arrays Leetcode Solution	Uber	LeetCode Array
Easy	Crawler Log Folder Leetcode Solution	Mercari	LeetCode Stack
Easy	Excel Sheet Column Title Leetcode Solution	Adobe Google	LeetCode
Easy	Excel Sheet Column Number Leetcode Solution	Microsoft	LeetCode
Easy	Increasing Decreasing String Leetcode Solution	Akuna Capital	LeetCode Sorting String
Easy	Number of Steps to Reduce a Number to Zero Leetcode Solution	Amazon Google HRT Microsoft	LeetCode
Easy	Remove Palindromic Subsequences Leetcode Solution	Amazon	LeetCode String
Easy	Convert Integer to the Sum of Two No-Zero Integers Leetcode Solution	HRT	LeetCode
Easy	Rank Transform of an Array Leetcode Solution	Amazon Facebook Google	LeetCode Array
Easy	Decompress Run-Length Encoded List Leetcode Solution	Amazon Apple Google	LeetCode Array
Easy	Maximum Nesting Depth of the Parentheses Leetcode Solution	Bloomberg	LeetCode String
Easy	Design Parking System Leetcode Solution	Amazon	LeetCode Design
Easy	Maximum 69 Number Leetcode Solution	HRT	LeetCode
Easy	Defanging an IP Address Leetcode Solution	Amazon	LeetCode String
Easy	Distribute Candies to People Leetcode Solution		LeetCode
Easy	Minimum Distance Between BST Nodes Leetcode Solution	Google	LeetCode Tree
Easy	Replace Elements with Greatest Element on Right Side Leetcode Solution	Amazon	LeetCode Array
Medium	Combinations Leetcode Solution	Adobe Amazon Apple Facebook Google Microsoft Yahoo	LeetCode Backtracking
Easy	Find Winner on a Tic Tac Toe Game Leetcode Solution	Amazon Apple Facebook Zoho	LeetCode Array
Easy	String Matching in an Array Leetcode Solution	Amazon	LeetCode String
Easy	Next Greater Element I Leetcode Solution	Amazon Bloomberg	LeetCode Stack
Easy	Find Common Characters Leetcode Solution	Amazon Uber	LeetCode Array Hashing
Easy	Minimum Time Visiting All Points Leetcode Solution	Amazon Bloomberg Facebook Media.net	LeetCode Array
Easy	Find N Unique Integers Sum up to Zero Leetcode Solution	Adobe Amazon Facebook Microsoft	LeetCode Array
Easy	Intersection of Two Arrays II Leetcode Solution	Amazon Facebook Google Oracle	LeetCode Sorting
Easy	Minimum Absolute Difference Leetcode Solution	Audible Bloomberg SAP Uber	LeetCode Array
Easy	Distance Between Bus Stops Leetcode Solution	Google	LeetCode Array
Easy	Valid Boomerang Leetcode Solution	Google	LeetCode
Easy	Partition Array Into Three Parts With Equal Sum Leetcode Solution	Amazon Microsoft	LeetCode Array
Easy	Find Common Characters Leetcode Solution	Adobe Amazon Apple Bloomberg Google Microsoft TripAdvisor Uber	LeetCode Array Hashing
Easy	Keyboard Row Leetcode Solution	Mathworks	LeetCode Hashing String
Easy	Is Subsequence Leetcode Solution	Adobe Amazon Bloomberg Facebook Google Microsoft Pinterest Yandex	LeetCode Dynamic Programming String
Easy	Jewels and Stones Leetcode Solution	Adobe Amazon Apple Facebook Google Microsoft Yahoo	LeetCode
Easy	Shortest Completing Word Leetcode Solution	Google	LeetCode
Easy	Compare Strings by Frequency of the Smallest Character Leetcode Solution	Google Oracle	LeetCode Array String
Easy	Maximum Number of Balloons Leetcode Solution	Tesla Wayfair	LeetCode Hashing String
Easy	Construct the Rectangle Leetcode Solution		LeetCode
Easy	To Lower Case Leetcode Solution	Adobe Apple Google	LeetCode String
Easy	Minimum Absolute Difference in BST Leetcode Solution	Google	LeetCode Tree
Easy	Student Attendance Record I Leetcode Solution	Google	LeetCode String
Easy	Count Odd Numbers in an Interval Range Leetcode Solution	Microsoft	LeetCode
Easy	Assign Cookies Leetcode Solution	Amazon	LeetCode
Easy	Find All Numbers Disappeared in an Array Leetcode Solution	Adobe Amazon Apple Bloomberg Google Microsoft Yahoo	LeetCode Array Hashing
Easy	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	Cisco Google Uber	LeetCode
Medium	Majority Element II Leetcode Solution	Adobe Amazon Apple Bloomberg Facebook Google Microsoft Zenefits	LeetCode Array
Easy	Relative Ranks Leetcode Solution	Google	LeetCode Sorting
Easy	Majority Element Leetcode Solution	Amazon Apple Atlassian Bloomberg Facebook GoDaddy Google Microsoft Oracle Rubrik Snapchat Yahoo Zenefits	LeetCode Hashing
Easy	Contains Duplicate II Leetcode Solution	Amazon Facebook Google	LeetCode Array Hashing
Easy	Convert a Number to Hexadecimal Leetcode Solution	Facebook Microsoft	LeetCode
Easy	Relative Sort Array Leetcode Solution	Adobe Amazon DE Shaw eBay Google Microsoft	LeetCode Array Sorting
Easy	Find Words That Can Be Formed by Characters Leetcode Solution	Amazon	LeetCode Array Hashing
Easy	Base 7 Leetcode Solution	Bloomberg Garena	LeetCode
Easy	Summary Ranges Leetcode Solution	Facebook Yandex	LeetCode Array
Easy	Find Numbers with Even Number of Digits Leetcode Solution	Quora	LeetCode Array
Easy	Power of Four Leetcode Solution	Two Sigma	LeetCode
Easy	Number of Equivalent Domino Pairs Leetcode Solution	Amazon	LeetCode Array
Easy	Check If It Is a Straight Line Leetcode Solution	Palantir Technologies	LeetCode Array
Easy	Palindrome Linked List Leetcode Solution	Adobe Amazon Apple Bloomberg Capital One Cisco Facebook Google Grab Intel IXL Microsoft Nutanix Oracle Paytm Snapchat Uber Yandex	LeetCode
Easy	Pascal’s Triangle II Leetcode Solution	Amazon Microsoft	LeetCode Array Dynamic Programming
Easy	Maximum Depth of Binary Tree Leetcode Solution	Adobe Amazon Facebook Microsoft	LeetCode Tree Traversal
Easy	Maximum Depth of N-ary Tree Leetcode Solution	Amazon Google Microsoft	LeetCode Breadth First Search Depth First Search
Easy	Search in a Binary Search Tree Leetcode Solution	Apple IBM	LeetCode
Easy	Count Largest Group Leetcode Solution	Mercari	LeetCode Array
Easy	Find the Difference Leetcode Solution	Adobe Amazon Google	LeetCode Hashing String
Medium	Unique Paths Leetcode Solution	Adobe Amazon Apple Bloomberg ByteDance Facebook Goldman Sachs Google Mathworks Microsoft Oracle Qualtrics Salesforce Snapchat Uber VMware Walmart Labs	LeetCode Array Dynamic Programming
Easy	Add Binary Leetcode Solution	Amazon Facebook Microsoft	LeetCode String
Easy	Minimum Value to Get Positive Step by Step Sum Leetcode Solution	Swiggy	LeetCode Array
Easy	Valid Palindrome Leetcode Solution	Amazon Apple Bloomberg Facebook Microsoft Oracle Wayfair	LeetCode String
Easy	Reverse Vowels of a String Leetcode Solution	Amazon Facebook Google	LeetCode String
Easy	Roman to Integer Leetcode Solution	Adobe Amazon Apple Bloomberg Facebook Goldman Sachs Google LinkedIn Microsoft Oracle Qualtrics Roblox Uber Yahoo	LeetCode String
Easy	N-th Tribonacci Number Leetcode Solution	Facebook	LeetCode Dynamic Programming
Medium	Rotate List Leetcode Solution	Adobe Amazon Bloomberg Facebook LinkedIn Microsoft Samsung	LeetCode
Easy	Path Crossing Leetcode Solution	Amazon	LeetCode Hashing String
Easy	Matrix Diagonal Sum Leetcode Solution	Adobe	LeetCode Array Matrix
Easy	Number of Good Pairs Leetcode Solution	Amazon Microsoft	LeetCode Array Hashing
Easy	Third Maximum Number Leetcode Solution	Amazon Facebook Google	LeetCode Array
Medium	Pow(x, n) Leetcode Solution	Adobe Amazon Apple Asana Bloomberg eBay Facebook Goldman Sachs Google LinkedIn Microsoft Oracle PayPal Uber VMware Walmart Labs	LeetCode
Easy	Find Lucky Integer in an Array Leetcode Solution	Microsoft	LeetCode Array
Easy	Reformat The String Leetcode Solution	Microsoft	LeetCode String
Easy	Find the Difference Leetcode Solution	Adobe Amazon Google	LeetCode Hashing
Medium	Insert into a Binary Search Tree Leetcode Solution	Amazon Apple Atlassian Facebook Google Microsoft	LeetCode
Medium	Iterative Inorder Traversal of a Binary Tree		tree Tree Traversal
Easy	Merge Two Sorted Lists Leetcode Solutions	Adobe Amazon Apple Bloomberg Capital One Facebook Google IBM Microsoft Oracle	LeetCode
Medium	Morris Inorder Traversal		tree Tree Traversal
Easy	Sum of Left Leaves Leetcode Solutions	Adobe	LeetCode Tree Tree Traversal
Easy	Generate a String With Characters That Have Odd Counts Leetcode Solution	DiDi	LeetCode String
Medium	Permutations Leetcode Solution	Adobe Amazon Apple Atlassian Bloomberg ByteDance eBay Facebook Garena GoDaddy Goldman Sachs Google LinkedIn Microsoft Oracle Salesforce SAP Uber VMware Walmart Labs Yahoo	LeetCode Backtracking
Easy	Minimum Depth of Binary Tree Leetcode Solution	Amazon Apple Facebook	LeetCode Breadth First Search Depth First Search
Easy	Power of Two Leetcode Solution	Apple	LeetCode
Easy	Balanced Binary Tree Leetcode Solution	Amazon Google Microsoft	LeetCode Array
Easy	Two Sum Leetcode Solution	Apple ByteDance Intuit Microsoft Oracle	LeetCode
Easy	Count Primes Leetcode Solutions	Amazon Apple Capital One Google Microsoft	LeetCode Hashing
Medium	House Robber II Leetcode Solution	Adobe Amazon Apple eBay Google Microsoft Walmart Labs	LeetCode Dynamic Programming
Easy	Sqrt(x) Leetcode Solution	Amazon Apple Bloomberg Google lyft Microsoft Uber	LeetCode
Easy	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	Adobe Amazon Bloomberg	LeetCode Array Hashing
Easy	Convert Sorted Array to Binary Search Tree Leetcode Solution	Adobe Airbnb Amazon Apple Bloomberg Cisco Google Microsoft Oracle Spotify VMware Yahoo	LeetCode Depth First Search
Medium	Multiply Strings Leetcode Solution	Amazon Apple ByteDance Expedia Facebook Google Houzz Mathworks Microsoft Oracle Square Twitter Uber Zillow	LeetCode String
Easy	Sum of All Odd Length Subarrays Leetcode Solution	LinkedIn	LeetCode Array
Easy	Merge Sorted Arrays Leetcode Solution	Adobe Amazon Apple Bloomberg ByteDance Cisco eBay Expedia Facebook Goldman Sachs Google IBM LinkedIn lyft Microsoft Netflix Oracle Tableau Uber VMware Yahoo Yandex	LeetCode Array
Medium	Search in Rotated Sorted Array Leetcode Solution	Adobe Alibaba Amazon Apple Bloomberg ByteDance Cisco eBay Expedia Facebook Goldman Sachs Google JPMorgan LinkedIn Microsoft Nutanix Nvidia Oracle PayPal Paytm Salesforce Samsung ServiceNow Tencent Tesla TripAdvisor Twitch Uber Visa VMware Walmart Labs Yahoo Yandex Zillow Zulily	LeetCode Array
Medium	Lexicographical Numbers Leetcode Solution	ByteDance	LeetCode Depth First Search
Medium	Integer to Roman Leetcode Solution	Adobe Amazon Apple BlackRock Bloomberg Evernote Facebook Google LinkedIn Microsoft Oracle Twitter Yahoo	LeetCode String
Easy	Special Array With X Elements Greater Than or Equal X Leetcode Solution	Google	LeetCode Array Hashing
Easy	Search Insert Position Leetcode Solution	Adobe Amazon Apple Bloomberg Google Microsoft	LeetCode Array
Easy	Kids With the Greatest Number of Candies Leetcode Solution	Amazon Bloomberg	LeetCode Array
Easy	Make The String Great Leetcode Solution	Google	LeetCode Stack String
Easy	Running Sum of 1d Array Leetcode Solution	Adobe Amazon Apple Bloomberg Uber	LeetCode Array
Easy	Length of Last Word Leetcode Solution	Google	LeetCode String
Medium	Minimum Score Triangulation of Polygon Leetcode Solution	Uber	LeetCode Dynamic Programming
Easy	Sort Integers by The Number of 1 Bit Leetcode Solution	Adobe	LeetCode Sorting
Easy	Plus One Leetcode Solution	Adobe Amazon Apple Capital One Facebook Google Microsoft	LeetCode Array
Easy	Check If N and Its Double Exist Leetcode Solution	Google	LeetCode Array
Easy	Day of the Year Leetcode Solution	ZScaler	LeetCode
Easy	Special Positions in a Binary Matrix Leetcode Solution	Google	LeetCode Array Matrix
Easy	Water Bottles Leetcode Solution	Microsoft	LeetCode
Easy	Maximum Product of Two Elements in an Array Leetcode Solution	Samsung	LeetCode Array
Easy	Mean of Array After Removing Some Elements Leetcode Solution	Google	LeetCode Array
Medium	Swap Nodes in Pairs Leetcode Solutions	Amazon Apple Bloomberg Facebook Microsoft	LeetCode
Medium	Kth largest element in an Array Leetcode Solutions	Adobe Amazon Apple ByteDance eBay Expedia Facebook Google LinkedIn Microsoft Oracle Salesforce Spotify Walmart Labs	LeetCode Array
Easy	Kth Missing Positive Number Leetcode Solution	Facebook Microsoft	LeetCode Array Hashing
Easy	XOR Operation in an Array Leetcode Solution	Walmart Labs	LeetCode Array
Easy	Three Consecutive Odds Leetcode Solution	Dji	LeetCode Array
Easy	Ugly Number Leetcode Solution		LeetCode
Easy	Max Consecutive Ones Leetcode Solution	Amazon	LeetCode Array
Easy	House Robber Leetcode Solution	Amazon Apple Cisco Microsoft Oracle	LeetCode Dynamic Programming
Easy	Happy Number Leetcode Solution	Adobe Amazon Apple	LeetCode Hashing
Hard	Sqrt (or Square Root) Decomposition Technique	Cadence India PayPal Qualtrics Roblox Twilio
Medium	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	Accenture Adobe Amazon Factset Zoho	array
Medium	Armstrong Number	Oracle VMware
Medium	Scramble String	Amazon Fanatics Samsung	string Dynamic Programming Tree
Easy	Sort Array By Parity II Leetcode Solution	Amazon	LeetCode Array Sorting
Easy	Valid Anagrams	Amazon Goldman Sachs Google Microsoft Nagarro	string Hashing
Medium	Contiguous Array	Amazon MakeMyTrip Morgan Stanley Paytm	array Hashing
Medium	Convex Hull Algorithm	Geometric Morgan Stanley Samsung	algorithm
Medium	Group Anagrams	Amazon Facebook Google Microsoft	string Hashing
Hard	Integer to English words	Amazon Facebook Microsoft Oracle	string
Medium	Unique Paths II	Amazon VMware	matrix Dynamic Programming
Medium	Maximum Length of Repeated Subarray	Indeed Karat Roblox	array Dynamic Programming Hashing
Easy	Count pair with Given Sum	Accolite Amazon Factset Hike	array Hashing Sorting
Easy	Minimum Delete Operations to make all Elements of Array Same	Adobe Factset	hashing Array
Medium	Maximum Distance Between two Occurrences of Same Element in Array	Delhivery Factset Fanatics Fourkites	hashing Array
Easy	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	Accolite Adobe Amazon Delhivery Fourkites	hashing Array
Medium	Union and Intersection of two Linked Lists	24*7 Innovation Labs Accolite Amazon Flipkart Komli Media Microsoft Taxi4Sure VMware Walmart Labs	linked-list Sorting
Medium	Maximum difference between frequency of two elements such that element having greater frequency is also greater	Accenture Accolite Amazon VMware	array Sorting
Easy	Lemonade Change Leetcode Solution	Amazon Atlassian	LeetCode
Medium	Find the Smallest Divisor given a Threshold Leetcode Solution	AppDynamics Google SAP Walmart Labs	LeetCode
Easy	Maximize Sum of Array after K Negations Leetcode Solution	Amazon	LeetCode Array
Easy	Valid Perfect Square Leetcode Solution	Amazon	LeetCode
Easy	Average Salary Excluding the Minimum and Maximum Salary Leetcode Solution	NetSuite	LeetCode
Hard	Smallest Subarray with k Distinct Numbers	Amazon Google	hashing Array
Medium	All Unique Triplets that Sum up to a Given Value	Accolite Amazon Fanatics	array Hashing
Easy	Longest Subarray Having Count of 1s One More than Count of 0s	Accenture Amazon DE Shaw Samsung	array
Medium	Maximum Array from Two given Arrays Keeping Order Same	Accenture Amazon Delhivery Factset Fourkites OYO Rooms Publicis Sapient Zoho	array
Medium	Round Robin Scheduling	Amazon Facebook Google Microsoft
Easy	Count Subarrays with Same Even and Odd Elements	Accenture Factset Fanatics	array
Hard	Find Smallest Range Containing Elements from k Lists	Amazon Apple Google Uber	dynamic-programming String
Medium	Guess Number Higher or Lower II	Amazon Google Microsoft	dynamic-programming Array
Easy	Rearrange an Array Such that arr[i] is equal to i	Accenture Adobe Amazon Fanatics Fourkites Zoho	array
Easy	Segregate 0s and 1s in an Array	Accolite Amazon Fab MakeMyTrip PayPal Paytm Zoho	array
Medium	Find Largest d in Array such that a + b + c = d	Accolite Amazon Delhivery Fanatics Fourkites FreeCharge	hashing Array
Medium	Maximum Number of Chocolates to be Distributed Equally Among k Students	Accenture Adobe Amazon Facebook Fourkites	array
Easy	Maximum Consecutive Numbers Present in an Array	Accolite Adobe Amazon Fourkites MAQ	array
Easy	Move all Negative Numbers to Beginning and Positive to End with Constant Extra Space	Capgemini Hike MAQ o9 solutions TCS	array Sorting
Hard	Queries for Number of Distinct Elements in a Subarray	Amazon Google Microsoft Oracle Uber	array Tree
Hard	Queries on Probability of Even or Odd Number in given Ranges	Google Honeywell Uber	array
Medium	Total Numbers With no Repeated Digits in a Range	Accolite Factset MAQ	array
Hard	Range Minimum Query (Square Root Decomposition and Sparse Table)	Amazon Apple Google	array
Medium	Range Sum Query using Sparse Table	Amazon Publicis Sapient Zoho	array
Hard	Count and Toggle Queries on a Binary Array	Amazon Facebook Google Uber	array
Medium	Queries for Decimal Values of Subarrays of a Binary Array	Amazon Google	array
Medium	Maximize Elements Using Another Array	Amazon Fanatics Fourkites	array Sorting
Easy	Find whether an array is subset of another array	Accolite GE Healthcare Qualcomm	array Sorting
Easy	Minimum swaps required to bring all elements less than or equal to k together	Amazon AppDynamics Factset Fourkites Microsoft	hashing Array
Easy	Maximum sum of pairs with specific difference	Accolite Coursera Delhivery Fourkites Snapdeal	dynamic-programming Array
Medium	Find First and Last Position of Element in Sorted Array Leetcode Solution	Amazon Bloomberg ByteDance Facebook Google Microsoft Oracle Uber	LeetCode Array
Easy	Monotonic Array LeetCode Solution	Amazon Facebook	LeetCode Array
Hard	Smallest Good Base	Google	string
Easy	Find top three repeated in array	MAQ o9 solutions Wipro	hashing Array
Medium	Maximum sum of a path in a Right Number Triangle	Citrix DE Shaw Directi Expedia	dynamic-programming
Medium	Sorting using trivial hash function	Cadence India Capgemini Factset MAQ UHG Optum	hashing Array Sorting
Medium	Maximum number of segments of lengths a, b and c	Amazon BlackRock ByteDance Citrix Google Teradata Uber	dynamic-programming
Medium	Maximum subsequence sum such that no three are consecutive	24*7 Innovation Labs Accenture Amazon Delhivery PayPal PayU	dynamic-programming Array
Easy	Count all subsequences having product less than K	ByteDance Capital One CodeNation Databricks Expedia Yandex	dynamic-programming Array
Easy	Find duplicates in a given array when elements are not limited to a range	Adobe Amazon Factset MAQ UHG Optum	hashing Array
Medium	Minimum insertions to form a palindrome with permutations allowed	Amazon CodeNation Directi Google Indeed Intuit	string Dynamic Programming
Hard	LCS (Longest Common Subsequence) of three strings	Amazon CodeNation Expedia Google Uber Zoho	dynamic-programming String
Medium	Check if Array Contains Contiguous Integers With Duplicates Allowed	Accenture Amazon Directi Facebook Intuit	hashing Array String
Medium	Course Schedule II – LeetCode		LeetCode Breadth First Search Depth First Search Graph Topological Sort
Medium	Subset Sum Leetcode		LeetCode Array Dynamic Programming
Medium	Capacity To Ship Packages Within D Days Leetcode Solution	Amazon	LeetCode Array
Easy	The K Weakest Rows in a Matrix Leetcode Solution	Amazon	LeetCode Array
Medium	Add and Search Word – Data structure design LeetCode		LeetCode Backtracking Design String Trie
Hard	Best Time to Buy and Sell Stock III Leetcode Solution	Adobe Amazon	LeetCode Array Dynamic Programming
Easy	Shuffle String Leetcode Solution	Facebook	LeetCode Sorting
Medium	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	Adobe Amazon Goldman Sachs Yahoo	LeetCode Dynamic Programming
Easy	Can Make Arithmetic Progression From Sequence Leetcode Solution	Amazon	LeetCode Array Sorting
Easy	Largest Perimeter Triangle Leetcode Solution	C3 IoT	LeetCode Sorting
Easy	Best Time to Buy and Sell Stock II Leetcode Solution	Amazon DE Shaw Facebook Microsoft Morgan Stanley Uber	LeetCode Array
Medium	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	Amazon	LeetCode Array Dynamic Programming
Easy	Sum of f(a[i], a[j]) over all pairs in an array of n integers	Cisco Facebook Hike Publicis Sapient	hashing Array
Medium	Longest Repeated Subsequence	Amazon Arcesium Avalara ByteDance Capital One Facebook MetLife	dynamic-programming String
Easy	Count of index pairs with equal elements in an array	Amazon Atlassian Citadel Facebook Intuit Snapdeal Square Yandex	hashing Array Sorting
Easy	Find Sum of all unique sub-array sum for a given array	Amazon Facebook GreyOrange Intuit Microsoft Nagarro	hashing Array Sorting
Easy	Sequences of given length where every element is more than or equal to twice of previous	Accenture Amazon CodeNation Facebook Google PayPal Qualcomm	dynamic-programming
Hard	Find maximum length Snake sequence	Amazon CodeNation Expedia Yandex	dynamic-programming Matrix
Medium	Print all triplets in sorted array that form AP	Accenture Accolite Cadence India Google InfoEdge Intuit Pinterest	array
Hard	Minimum sum of multiplications of n numbers	Accenture BlackRock GE Healthcare JP Morgan PayPal	dynamic-programming Array
Medium	Find number of pairs in an array such that their XOR is 0	Cadence India CouponDunia Honeywell Indeed InfoEdge Moonfrog Labs Pinterest	array Sorting
Easy	Count ways to reach the nth stair using step 1, 2 or 3	Amazon CodeNation GE Healthcare Microsoft Moonfrog Labs PayPal Uber	dynamic-programming
Medium	Minimum Sum Path in a Triangle	Amazon Apple Bloomberg	dynamic-programming Array
Medium	Longest subarray not having more than K distinct elements	Amazon Citadel Delhivery Facebook Microsoft Samsung Yandex	hashing Array
Medium	Morris Traversal	Amazon Facebook Fourkites Google Microsoft	tree Tree Traversal
Hard	Kth ancestor of a node in binary tree	Amazon Google	tree Tree Traversal
Hard	Maximum possible difference of two subsets of an array	Atlassian Cadence India Directi FreeCharge Opera PayU Snapchat Times Internet Xome	hashing Array Sorting
Medium	Find postorder traversal of BST from preorder traversal	Amazon Fourkites PayU	tree Tree Traversal
Hard	Inorder Successor of a node in Binary Tree	Amazon Expedia Morgan Stanley OYO Rooms Snapchat	tree
Easy	Given an Array of Pairs Find all Symmetric Pairs in it	Amazon Capgemini Cisco FreeCharge Moonfrog Labs Opera Xome	array
Easy	Minimum operation to make all elements equal in array	Amazon BlackRock Citadel Directi Flipkart Indeed Yandex	hashing Array
Easy	Check if a given array can represent Preorder Traversal of Binary Search Tree	Adobe Amazon LinkedIn	tree Stack
Medium	Construct Binary Tree from given Parent Array representation	Amazon Microsoft Snapdeal	tree Array
Medium	Given a binary tree, how do you remove all the half nodes?	Accolite Amazon Microsoft PayU Snapdeal Synopsys Yahoo	tree
Easy	Iterative Preorder Traversal	Amazon Google JP Morgan Microsoft Morgan Stanley Uber	tree Tree Traversal
Medium	Find subarray with given sum (Handles Negative Numbers)	Amazon CouponDunia Delhivery GE Healthcare InfoEdge Moonfrog Labs	hashing Array
Medium	Length of the largest subarray with contiguous elements	Adobe Amazon Bloomberg Cisco Karat Monotype Solutions Paytm PayU Publicis Sapient SAP Labs	hashing Array
Easy	Find distance between two nodes of a Binary Tree	Amazon LinkedIn MakeMyTrip Netflix Samsung	tree
Medium	Maximum Number of Coins You Can Get Leetcode Solution		LeetCode Sorting
Medium	Count number of triplets with product equal to given number	Accolite Amazon Cisco Flipkart Kuliza Publicis Sapient	hashing Array
Medium	Maximum difference between first and last indexes of an element in array	Accolite Amazon Hike MakeMyTrip Ola Cabs SAP Labs	hashing Array
Easy	Write Code to Determine if Two Trees are Identical	Amazon Factset Fanatics GE Healthcare Microsoft PayPal	tree
Hard	Find any one of the multiple repeating elements in read only array	Capital One Facebook Google Indeed Microsoft Pinterest	hashing Array
Easy	Find elements which are present in first array and not in second	Accolite Delhivery Factset Fanatics Snapdeal Zoho	hashing Array
Medium	Boundary Traversal of binary tree	Accolite Amazon Hike Kritikal Solutions Microsoft Morgan Stanley PayU Snapdeal	tree Tree Traversal
Hard	Check for Palindrome after every character replacement Query	Amazon Facebook Flipkart Google Netflix	hashing String
Easy	Difference between highest and least frequencies in an array	Citadel Fab Fourkites Roblox Tesla	hashing Array Sorting
Medium	Diagonal Traversal of Binary Tree	Amazon Factset Fanatics Fourkites Oracle PayU Quora	tree Tree Traversal
Medium	Koko Eating Bananas Leetcode Solution	Facebook	LeetCode
Easy	Bottom View of a Binary Tree	Accolite Amazon CouponDunia Flipkart Paytm Walmart Labs	tree Tree Traversal
Medium	Letter Combinations of a Phone Number	Amazon Apple Atlassian Capital One Databricks eBay Facebook Google Microsoft Morgan Stanley Oracle Qualtrics Twilio Uber VMware Walmart Labs	queue Backtracking Depth First Search String
Hard	Find four elements that sum to a given value (Hashmap)	Amazon Google Microsoft	hashing Array Sorting
Medium	Count even length binary sequences with same sum of first and second half bits	24*7 Innovation Labs Amazon Dell GE Healthcare	dynamic-programming
Easy	Longest subsequence such that difference between adjacents is one	Amazon Avalara Factset Fourkites Microsoft	dynamic-programming Array
Medium	Find all triplets with zero sum	Amazon GE Healthcare Google Hike	array Sorting
Easy	k-th missing element in increasing sequence which is not present in a given sequence	Citadel Expedia Fab Factset IBM SAP Labs	hashing Array
Easy	How to check if two given sets are disjoint?	Factset Hike Kuliza Nagarro Opera Snapdeal	hashing Array Sorting
Easy	Check if a given array contains duplicate elements within k distance from each other	Amazon Avalara Citadel FreeCharge HackerRank Snapchat Snapdeal	hashing Array
Easy	Print Right View of a Binary Tree	Accolite Adobe Amazon MakeMyTrip Snapdeal	tree Tree Traversal
	Count Negative Numbers in a Sorted Matrix LeetCode Solution		LeetCode Matrix
Medium	Check if two arrays are equal or not	Accenture Goldman Sachs MAQ o9 solutions Taxi4Sure Twilio	hashing Array Sorting
Medium	Pair with given product	24*7 Innovation Labs Amazon Avalara Quora Roblox	hashing Array
Medium	Maximum path sum in a triangle	Arcesium CodeNation GE Healthcare PayU Uber Zoho	dynamic-programming
Easy	Path with maximum average value	Cisco Epic Systems GreyOrange SAP Labs Times Internet	dynamic-programming Array Matrix
Easy	Maximum Distance in Array	Adobe Amazon Google Oracle	matrix Array
Medium	Find if there is a subarray with 0 sum	Citrix DE Shaw Goldman Sachs Indeed MakeMyTrip OYO Rooms Paytm TCS	hashing Array
Easy	Find missing elements of a range	Delhivery GreyOrange LinkedIn Nagarro Opera Synopsys	hashing Sorting
Easy	First element occurring k times in an array	Amazon Hike PayU SAP Labs Teradata Wipro Yatra Zoho	hashing Array
Easy	Maximum product of an increasing subsequence	Accolite GE Healthcare HackerRank IBM Snapchat Yahoo	dynamic-programming Array
Hard	Print all subarrays with 0 sum	Amazon FreeCharge Indeed Info Edge Microsoft OYO Rooms	hashing Array
Easy	Contains Duplicate	Adobe Amazon Apple	hashing Array
Medium	Print Maximum Length Chain of Pairs	Amazon	dynamic-programming
Easy	Print n terms of Newman-Conway Sequence	Amazon Citadel Factset Fanatics JP Morgan	dynamic-programming
Hard	Count Substrings with equal number of 0s, 1s and 2s	Citrix FreeCharge Goldman Sachs OYO Rooms Times Internet Twilio	hashing String
Medium	Longest Substring Without Repeating Characters	Adobe Alation Amazon Apple Bloomberg ByteDance Cisco eBay Expedia Facebook Goldman Sachs Google Microsoft Morgan Stanley Oracle SAP SAP Labs Spotify Uber VMware Yahoo	string Hashing
Medium	Remove Duplicates from Sorted List II	Amazon	linked-list
Medium	Form minimum number from given sequence	Accolite Amazon Fanatics Goldman Sachs Info Edge Snapchat	string Array Stack
Medium	Print modified array after executing the commands of addition and subtraction	ByteDance Cisco Citrix FreeCharge HackerRank Nagarro Opera Teradata	dynamic-programming Array
Easy	Write a function to get the intersection point of two Linked Lists	Accolite Amazon DE Shaw Factset Goldman Sachs MakeMyTrip MAQ Microsoft Qualcomm Snapdeal Visa Zopper	linked-list
Easy	Newman-Conway Sequence	Amazon Honeywell	dynamic-programming
Medium	Generate all possible sorted arrays from alternate elements of two given sorted arrays	Directi Karat PayPal Twilio Yandex	array
Medium	Moser-de Bruijn Sequence	FreeCharge Snapdeal Times Internet	dynamic-programming
Hard	Range Queries for Longest Correct Bracket Subsequence	Amazon CodeNation Google PayPal Uber	dynamic-programming Array Stack
Hard	Print modified array after multiple array range increment operations	Expedia FreeCharge Google Indeed Moonfrog Labs Ola Cabs Qualtrics	dynamic-programming Array
Medium	Number of indexes with equal elements in given range	GreyOrange Indeed Opera Pinterest Snapdeal Yahoo	dynamic-programming Array
Hard	Longest Bitonic Subsequence	CodeNation DE Shaw Google JP Morgan Microsoft	dynamic-programming Array
Easy	Golomb sequence	Cadence India Indeed Times Internet Yatra	dynamic-programming
Hard	Array Queries for multiply replacements and product	Cadence India DE Shaw Expedia Google	array
Easy	Newman–Shanks–Williams prime	HackerRank	dynamic-programming
Hard	Difference Array \| Range update query in O(1)	Arcesium CodeNation Directi Expedia Google Qualcomm	dynamic-programming Array
Hard	Painting Fence Algorithm	CodeNation Facebook Google Intuit JP Morgan Morgan Stanley	dynamic-programming Array
Easy	Check in binary array the number represented by a subarray is odd or even	Cisco Fab IBM Microsoft PayU Snapchat Snapdeal Teradata	array
Medium	Largest subarray with equal number of 0s and 1s	Amazon Coursera GreyOrange MakeMyTrip Morgan Stanley Paytm Synopsys Times Internet	hashing Array
Medium	Binary array after M range toggle operations	Amazon Coursera Goldman Sachs Google GreyOrange Snapchat	dynamic-programming Array
Easy	Constant time range add operation on an array	CodeNation DE Shaw Directi Expedia Google	dynamic-programming Array
Medium	Delete Nth node from the end of the given linked list	Adobe Amazon Arcesium Factset Intuit Zoho	linked-list
Easy	Delete a Node from linked list without head pointer	GE Healthcare MAQ	linked-list
Medium	Count Primes in Ranges	Google Hike Kuliza Sieve Snapchat Yahoo	dynamic-programming
Easy	Print the Fibonacci numbers in reverse order	Accenture MAQ o9 solutions UHG Optum	dynamic-programming
Easy	Print Fibonacci sequence using 2 variables	Amazon Delhivery Factset Fourkites Hike MAQ o9 solutions PayU	dynamic-programming
Easy	Non-overlapping sum of two sets	Accolite Amazon Hike Kuliza Pinterest Snapdeal Synopsys Teradata	hashing Array
Hard	Find all pairs (a, b) in an array such that a % b = k	Amazon Arcesium Citadel Directi FreeCharge Yahoo	hashing Array
Hard	Range LCM Queries	Amazon Directi Google Indeed PayPal Snapdeal Uber	tree Array
Medium	Queries on XOR of greatest odd divisor of the range	24*7 Innovation Labs Citadel Directi Expedia Google Indeed Snapdeal	dynamic-programming Array
Easy	Compute nCr % p	Accenture Cadence India Komli Media Ola Cabs Square	dynamic-programming
Easy	Cutting a Rod	Amazon Directi Flipkart Google JP Morgan Microsoft	dynamic-programming
Hard	Queries for counts of array elements with values in given range	Coursera DE Shaw Google PayU Snapdeal Times Internet Yahoo	array
Hard	Number of elements less than or equal to a given number in a given subarray	CodeNation DE Shaw Google Opera PayPal Pinterest	tree Array
Medium	Largest divisible pairs subset	Amazon Google	dynamic-programming
Hard	GCDs of given index ranges in an array	DE Shaw PayPal Snapchat Snapdeal Times Internet Xome	tree Array
Hard	Queries for GCD of all numbers of an array except elements in a given range	Amazon Capital One DE Shaw Google PayPal Quora Teradata	dynamic-programming Array
Hard	Find whether a subarray is in form of a mountain or not	Amazon BlackRock Cisco Citrix Factset Honeywell Tesla Yandex	dynamic-programming Array
Medium	Mean of range in array	Cadence India Expedia FreeCharge GreyOrange Roblox Snapchat Snapdeal Times Internet Yandex	dynamic-programming Array
Hard	Subset with sum divisible by m	Arcesium Cisco DE Shaw Directi Expedia Myntra PayU	dynamic-programming Array
Medium	Check if any two intervals overlap among a given set of intervals	Amazon Arcesium Cisco Directi JP Morgan Microsoft Qualcomm Yandex	dynamic-programming Sorting
Easy	Range sum queries without updates	BlackRock GE Healthcare Moonfrog Labs Synopsys Taxi4Sure Twilio	dynamic-programming Array
Easy	Max stack	Apple lyft Uber	stack Design
Medium	Subset Sum Problem in O(sum) space	Adobe Amazon Drishti-Soft	dynamic-programming Array
Easy	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	Adobe Amazon Flipkart Oracle OYO Rooms Snapdeal Walmart Labs Yatra	stack Array String
Hard	Products of ranges in an array	Accolite DE Shaw FreeCharge Google SAP Labs Snapdeal Times Internet	array
Easy	Friends Pairing Problem	Amazon Expedia GE Healthcare Google Honeywell JP Morgan	dynamic-programming
Easy	Happy Number	Adobe Amazon Apple JP Morgan
Easy	Palindrome Permutation	Facebook Microsoft	array Hashing String
Medium	Gold Mine Problem	Amazon Flipkart Google Microsoft PayU Uber	dynamic-programming Array Matrix
Easy	Palindrome Number	Adobe Amazon Bloomberg DBOI Google MAQ Microsoft o9 solutions
Easy	Design a stack that supports getMin() in O(1) time and O(1) extra space	Adobe Amazon Factset Flipkart Goldman Sachs GreyOrange Kuliza Microsoft Paytm Publicis Sapient SAP Snapdeal VMware	stack
Medium	Find Maximum Level sum in Binary Tree	Amazon	tree Breadth First Search Queue Tree Traversal
Easy	Tiling Problem	24*7 Innovation Labs Amazon DE Shaw Delhivery PayPal	dynamic-programming
Medium	Permutation Coefficient	BankBazaar Xome	dynamic-programming
Easy	Sort a stack using recursion	Amazon Goldman Sachs IBM Kuliza Yahoo	stack
Easy	Longest Increasing Consecutive Subsequence	Amazon Google Microsoft	dynamic-programming Array
Hard	Red-Black Tree Introduction	Amazon CodeNation Facebook Google Uber	tree
Easy	Delete middle element of a stack	Amazon	stack
Medium	Sorting array using Stacks	Amazon Goldman Sachs IBM Kuliza Yahoo	stack Sorting
Medium	Binomial Coefficient	Directi Expedia HackerRank Xome	dynamic-programming
Hard	Binary Search Tree Delete Operation	Accolite Amazon Qualcomm Samsung	tree
Easy	Best Time to Buy and Sell Stock	Adobe Amazon Apple Bloomberg ByteDance Cisco DE Shaw eBay Expedia Facebook Goldman Sachs Google JP Morgan Microsoft Morgan Stanley Oracle PayPal Qualtrics Samsung VMware	dynamic-programming Array
Medium	Implementation of Deque using Doubly Linked List	Adobe Alation Amazon American Express DE Shaw Factset Fourkites GE Healthcare Google Oxigen Wallet Qualcomm Spotify Sprinklr UHG Optum Wooker Xome ZScaler	linked-list Queue
Medium	Delete consecutive same words in a sequence	Factset	string Array Sorting Stack
Medium	Iterative Method to find Height of Binary Tree	Accolite Adobe Amazon Fanatics Fourkites Hike Snapdeal Yatra	tree Queue
Medium	Sort a stack using a temporary stack	Amazon Goldman Sachs IBM Kuliza Yahoo	stack Sorting
Easy	Reverse a stack without using extra space in O(n)	Factset Infosys MAQ	stack
Hard	Clone a Binary Tree with Random Pointers	Accolite Amazon Cisco Factset Fanatics Google Microsoft Opera Snapchat	tree
Medium	Top K Frequent Elements	Amazon Apple Bloomberg ByteDance Capital One eBay Facebook Google Microsoft Oracle Pocket Gems	queue Array Hashing
Medium	Level order traversal using two Queues	Amazon Hike Microsoft Morgan Stanley	queue Breadth First Search Tree Tree Traversal
Easy	Bubble sort using two Stacks	Amazon Capgemini Delhivery MAQ	stack Array Sorting
Hard	Text Justification	Amazon Coursera Google Indeed LinkedIn Microsoft Pinterest Snapchat	string
Easy	Reverse individual words	Amazon	string Stack
Medium	Count subarrays where second highest lie before highest	HackerRank	stack Array
Medium	Find the smallest binary digit multiple of given number	Amazon Fourkites LinkedIn Microsoft Snapdeal	graph Breadth First Search
Medium	Minimum Operations to convert X to Y	Amazon Factset Fanatics Fourkites JP Morgan Myntra Samsung Spotify Square	graph Breadth First Search
Easy	Find maximum difference between nearest left and right smaller elements	Fourkites	stack Array
Medium	Remove brackets from an algebraic string containing + and – operators	Adobe Amazon Fourkites	stack String
Easy	Implement a stack using single queue	Amazon Fourkites Google Infosys MAQ Microsoft	stack Queue
Hard	Find the First Circular Tour that visits all the Petrol Pumps	Amazon Factset Microsoft Morgan Stanley Zoho	queue
Easy	Sort an array according to the order defined by another array	Amazon Microsoft SAP Labs Snapchat Yahoo Zoho	array Sorting
Medium	Rearrange a binary string as alternate x and y occurrences	Accolite Cisco Citrix Hike IBM Info Edge Pinterest Roblox Tesla	string
Medium	Shuffle 2n integers as a1-b1-a2-b2-a3-b3-..bn without using extra space	Adobe DE Shaw Expedia Fanatics Indeed PayU	array
Easy	Distinct adjacent elements in an array	Coursera DE Shaw Hike IBM Kuliza Nagarro Opera OYO Rooms Zoho	array
Hard	Construction of Longest Increasing Subsequence (N log N)	Amazon BankBazaar Paytm Samsung	array Dynamic Programming
Easy	Maximize sum of consecutive differences in a circular array	Cadence India eBay GE Healthcare Karat Quora SAP Labs Square	array Sorting
Easy	Three way partitioning of an array around a given range	BankBazaar BlackRock Capital One Citadel Fab Moonfrog Labs Synopsys Twilio Yahoo	array
	Minimum time required to rot all oranges	Adobe Amazon Bloomberg Microsoft	graph Array Breadth First Search Matrix
Medium	Check if X can give change to every person in the Queue	Amazon	array Queue
Medium	Check if two nodes are on the same path in a Tree	Amazon Factset Fourkites Samsung	graph Depth First Search
Hard	Check if all levels of two Binary Tree are anagrams or not	Adobe Amazon Facebook Fanatics Fourkites GreyOrange	tree Queue
Medium	Minimum sum of squares of character counts in a given string after removing k characters	Amazon	queue String
Easy	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	Amazon Delhivery Kuliza Nagarro Opera Times Internet Yatra	array
Medium	Maximum length subsequence with difference between adjacent elements as either 0 or 1	Cisco Expedia Qualtrics SAP Labs Teradata	array Dynamic Programming
Easy	Replace two consecutive equal values with one greater	Accenture Citadel FreeCharge PayPal Square Teradata	array
Medium	Find a sorted subsequence of size 3 in linear time	Avalara Capital One Citadel Citrix eBay Fab Synopsys	array
Medium	Maximum Product Subarray	Amazon Cisco Microsoft Morgan Stanley Myntra PayU Times Internet Zoho	array
Easy	Convert array into Zig-Zag fashion	Accenture Amazon Fourkites Teradata Xome	array
Medium	First negative integer in every window of size k	Accolite Amazon PayPal Soroco	queue Array
Medium	Queue based approach for first non-repeating character in a stream	Amazon Flipkart Microsoft PayU Yahoo	queue String
Hard	Distance of nearest cell having 1 in a binary matrix	Accenture Amazon Honeywell HSBC Hulu Twitter	queue Array Breadth First Search Graph Matrix
Hard	Sum of minimum and maximum elements of all subarrays of size k	ByteDance Capital One CouponDunia Databricks Google Twilio Yandex	queue Array
Medium	An Interesting Method to generate Binary Numbers from 1 to n	Amazon Belzabar Mahindra Comviva ServiceNow Wooker	tree Breadth First Search Queue
Hard	Find the largest multiple of 3	Amazon	queue Dynamic Programming Sorting
	Transpose Graph	Accenture Amazon JP Morgan Microsoft Zycus	graph
Easy	Check if the given array can represent Level Order Traversal of Binary Search Tree	Amazon Citrix IBM Indeed Info Edge OYO Rooms Teradata	tree Queue Tree Traversal
Hard	Number of siblings of a given Node in n-ary Tree	Amazon Bloomberg CodeNation Google	tree Queue Tree Traversal
Hard	Check whether a given Binary Tree is Complete or not	Alation American Express Databricks Oxigen Wallet Spotify	tree Queue
Easy	Count the number of nodes at given level in a tree using BFS	Alation BankBazaar JP Morgan Square Taxi4Sure	tree Breadth First Search Graph Tree Traversal
Easy	BFS for Disconnected Graph	Amazon Hulu Karat Microsoft Salesforce	graph Breadth First Search
Medium	Page Replacement Algorithms in Operating Systems	Amazon Cognizant Factset Microsoft PayPal	algorithm
Medium	Check if a queue can be sorted into another queue using a stack	Amazon American Express MAQ	queue Sorting Stack
Medium	Priority Queue using doubly linked list	Amazon Citadel MAQ Wooker	queue
Easy	Implement Stack and Queue using Deque	Fanatics GE Healthcare MAQ Myntra Qualcomm	queue Stack
Medium	Form Minimum Number From Given Sequence	Amazon Goldman Sachs	stack Array String
Medium	Minimum number of distinct elements after removing m items	BlackRock ByteDance Expedia Ola Cabs Oracle PayU SAP Labs Yandex	tree Array
Hard	Convert BST into a Min-Heap without using array	Amazon Cisco Microsoft SAP Labs	tree
Medium	Pattern Occurrences using Stack		stack String
Medium	Number Of Longest Increasing Subsequence	Amazon Samsung Zoho	dynamic-programming Array
Hard	Merge two BSTs with limited extra space	Amazon Google Microsoft PayU Uber	tree
Easy	Count subarrays with equal number of 1’s and 0’s	Cisco CouponDunia Coursera Databricks Karat SAP Labs Tesla	hashing Array
Easy	Iterative Postorder Traversal Using Two Stacks	Adobe Amazon Factset Fourkites Paytm	stack Tree
Medium	Stack Permutations (Check if an array is stack permutation of other)	Amazon Fourkites	stack Queue
Hard	Palindrome Substring Queries	Amazon ByteDance eBay Expedia Google Intuit Microsoft PayPal Pinterest Synopsys	hashing Dynamic Programming String
Easy	Rearrange array such that even index elements are smaller and odd index elements are greater	Avalara Epic Systems Fourkites Roblox Tesla	array
Easy	Segregate even and odd numbers	Accolite LinkedIn MakeMyTrip Paytm	array Sorting
Hard	Minimum Steps to reach target by a Knight	Amazon LinkedIn MakeMyTrip	graph Breadth First Search Dynamic Programming Queue
Medium	Binary Tree to Binary Search Tree Conversion using STL set	Amazon Coursera Google Indeed Microsoft OYO Rooms	tree
Medium	Growable array based stack	MAQ Walmart Labs	stack Array
Easy	Find Minimum In Rotated Sorted Array	Adobe Amazon Microsoft Morgan Stanley Samsung Snapdeal Times Internet	array
Medium	Implementation of Deque using circular array	Amazon GE Healthcare Google Microsoft	queue Array
Easy	Move all negative elements to end in order with extra space allowed	Capital One Citrix IBM SAP Labs Taxi4Sure Twilio	array
Hard	K’th Largest element in BST using constant extra space	Amazon Expedia FreeCharge Microsoft Snapdeal Yahoo Yandex	tree
Medium	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	Amazon Citadel Expedia GE Healthcare Qualcomm Qualtrics Twilio Yatra	sorting Array
Easy	Rearrange array such that even positioned are greater than odd	Amazon LinkedIn OYO Rooms Times Internet Zoho	array Sorting
Medium	Double the first element and move zero to end	Microsoft Zoho	array
Easy	Arrange given numbers to form the biggest number	Amazon MakeMyTrip Paytm Zoho	string Array
Medium	K’th Largest Element in BST when modification to BST is not allowed	Amazon Cisco Google UHG Optum	tree
Easy	Tracking current Maximum Element in a Stack	Factset Fourkites Infosys	stack
Medium	Iterative method to find ancestors of a given binary tree	Adobe Amazon Fourkites Google InfoEdge Morgan Stanley Paytm Samsung	stack Tree
Easy	Check if stack elements are pairwise consecutive	Delhivery Factset Fourkites	stack
Easy	Remove duplicates from sorted array	Amazon Facebook Morgan Stanley Wipro Xome Zoho	array
Easy	Check if each internal node of a BST has exactly one child	Accenture Amazon Monotype Solutions PayPal Synopsys	tree
Medium	Elements to be added so that all elements of a range are present in array	GreyOrange Kuliza Snapdeal Synopsys Teradata Times Internet	hashing Array Sorting
Medium	Count subarrays having total distinct elements same as original array	Amazon Databricks Fab Honeywell PayU Square Teradata Yandex	hashing Array
Easy	Product of array except self	Accolite Amazon DE Shaw Morgan Stanley Opera	array
Medium	Height of a generic tree from parent array	Google PayU Qualcomm Sprinklr Uber	tree Breadth First Search Dynamic Programming Graph Queue
Medium	Find k-th smallest element in BST (Order Statistics in BST)	Accolite Amazon Google	tree
Easy	Linked List Cycle	Accolite Amazon MAQ Samsung	linked-list
Medium	Vertical sum in a given binary tree	Amazon Microsoft	tree
Easy	A program to check if a binary tree is BST or not	Accolite Adobe Amazon Boomerang Commerce Factset GreyOrange MakeMyTrip Microsoft Oracle OYO Rooms Qualcomm Snapdeal VMware Walmart Labs Wooker	tree
Medium	Check for Identical BSTs without building the trees	Fanatics Fourkites	tree
Easy	Maximum Depth Of Binary Tree	Amazon Cadence India CouponDunia Factset FreeCharge MakeMyTrip Monotype Solutions Snapdeal Synopsys Teradata VMware Zoho	tree Depth First Search Tree Traversal
Medium	Palindrome Partitioning	Amazon Facebook Google Microsoft	dynamic-programming Backtracking Depth First Search String
Hard	First missing positive	Accolite Amazon Factset Samsung Snapdeal	array
Medium	Contiguous Array Leetcode	Amazon Facebook Google	LeetCode Array Hashing
Easy	Reverse Integer	MakeMyTrip MAQ	string
Easy	Reverse words in a string	Accolite Adobe Amazon Cisco Goldman Sachs MakeMyTrip MAQ Microsoft Morgan Stanley Paytm PayU SAP Labs Wipro Zoho	string
Easy	Reverse a String	Infosys MAQ o9 solutions TCS	string
Easy	Seconds to Days	MAQ
Hard	Program for Bridge and Torch problem	Accolite eBay Quora Snapdeal Teradata Times Internet	dynamic-programming Array
Hard	Cuckoo Hashing	Epic Systems Flipkart Google Microsoft Netflix Tesla	hashing
Medium	Subarrays with distinct elements	Cisco FreeCharge Times Internet Zoho	hashing Array
Easy	Find the minimum distance between two numbers	CouponDunia Coursera Delhivery Moonfrog Labs PayPal Paytm Snapchat	array
Hard	Boolean Parenthesization Problem	Amazon LinkedIn Microsoft	dynamic-programming
Hard	K maximum sums of overlapping contiguous sub-arrays	CodeNation Dell Facebook GE Healthcare Google Qualcomm	dynamic-programming Array
Medium	Count quadruples from four sorted arrays whose sum is equal to a given value x	Accolite Fanatics Moonfrog Labs Synopsys	hashing Array Sorting
Medium	Count pairs from two linked lists whose sum is equal to a given value	Adobe Amazon Avalara Expedia Fanatics Google Indeed Microsoft PayPal Tesla	hashing Sorting
Easy	Find sum of non-repeating elements (distinct) elements in an array	Oxigen Wallet	hashing Array Sorting
Hard	Find distinct elements common to all rows of a matrix	BlackRock Expedia JP Morgan Qualcomm Snapdeal Yatra Zoho	hashing Matrix Sorting
Easy	Numbers with prime frequencies greater than or equal to k	Accolite Amazon Factset Fourkites GreyOrange Pinterest Xome	hashing Array
Medium	Convert an array to reduced form	LinkedIn Snapchat Xome Yahoo	hashing Array Sorting
Medium	Find pairs with given sum such that elements of pair are in different rows	Amazon DE Shaw Directi GreyOrange Indeed Pinterest Teradata	hashing Array Matrix
Medium	Common elements in all rows of a given matrix	Amazon Cisco DE Shaw Opera SAP Labs Zoho	hashing Array Matrix
Easy	Count pairs from two sorted arrays whose sum is equal to a given value x	BankBazaar Cisco Citadel Honeywell PayU Roblox Taxi4Sure Yandex	array Sorting
Medium	Find all permuted rows of a given row in a matrix	24*7 Innovation Labs Accenture Expedia IBM JP Morgan Quora	hashing Array Matrix
Medium	How to print maximum number of A’s using given four keys	Amazon Facebook Google PayPal Paytm	dynamic-programming
Medium	Collect maximum points in a grid using two traversals	Amazon Fab Goldman Sachs Google Honeywell LinkedIn Pinterest Yahoo	dynamic-programming Array Matrix
Easy	Given two unsorted arrays find all pairs whose sum is x	Amazon Facebook	hashing Array
Hard	Convert BST to Min Heap	Amazon BlackRock ByteDance GE Healthcare Honeywell	tree
Easy	Sort elements by frequency	Amazon Oracle Zoho Zycus	hashing Array Sorting
Easy	Convert String To Int	MAQ	string
Easy	Find the first repeating element in an array of integers	Amazon Fanatics MAQ Microsoft Oracle	hashing Array
Medium	Maximum weight transformation of a given string	Amazon BlackRock ByteDance CodeNation DE Shaw Expedia JP Morgan Ola Cabs	dynamic-programming String
Hard	Word Wrap Problem	Arcesium Factset GreyOrange Microsoft Myntra Ola Cabs PayU	dynamic-programming
Hard	The Painter’s Partition Problem	CodeNation Google	dynamic-programming
	Maximum Subarray Sum Excluding Certain Elements	Accolite CodeNation Directi JP Morgan Qualcomm	dynamic-programming Array
Hard	Merge Two Balanced Binary Search Trees	Amazon GE Healthcare Google Microsoft Salesforce Spotify	tree
Easy	Binary Search Tree Search and Insertion	Amazon DBOI Fanatics GE Healthcare MAQ Microsoft UHG Optum	tree
Easy	Count items common to both the lists but with different prices	Amazon Factset GE Healthcare Honeywell TCS Tesla	hashing
Hard	Mobile Numeric Keypad Problem	Amazon MAQ Microsoft Sprinklr	dynamic-programming Matrix String
Easy	Find the subarray with least average	Amazon Capital One Moonfrog Labs	array
Easy	Find the smallest positive integer value that cannot be represented as sum of any subset of a given array	Databricks Fab Taxi4Sure UHG Optum	array
Easy	Minimum number of subsets with distinct elements	Capital One GE Healthcare IBM Moonfrog Labs Yandex	hashing Array Sorting
Medium	Maximum sum bitonic subarray	Cisco DE Shaw Dell Fourkites Goldman Sachs Grofers IBM PayU Quora Yahoo	dynamic-programming Array
Easy	Find minimum number of merge operations to make an array palindrome	Accolite Adobe Amazon Fourkites	array
Medium	Minimize the maximum difference between the heights	Adobe Cisco Fanatics Yandex	array
Medium	Longest Span with same Sum in two Binary arrays	Accenture Cisco Indeed Kuliza SAP Labs Yandex	hashing Array
Medium	Convert a normal BST to Balanced BST	American Express ByteDance Capital One Grofers Intel Splunk Zoho	tree
Hard	Largest area rectangular sub-matrix with equal number of 1’s and 0’s	Accenture Indeed Info Edge Monotype Solutions PayPal Pinterest Synopsys Times Internet UHG Optum	dynamic-programming Array Matrix
Medium	A Space Optimized DP solution for 0-1 Knapsack Problem	Amazon BlackRock ByteDance CodeNation JP Morgan Netskope Ola Cabs Qualcomm	dynamic-programming
Easy	Check given array of size n can represent BST of n levels or not	Amazon Hulu Intel Juniper Networks Microsoft Robinhood Yelp	tree Array
Easy	Find maximum average subarray of k length	Amazon	array
Hard	Printing brackets in Matrix Chain Multiplication Problem	Amazon Avalara Citadel Databricks Directi JP Morgan Paytm Twilio	dynamic-programming Array Matrix
Easy	Size of The Subarray With Maximum Sum	Coursera GreyOrange UHG Optum Xome	dynamic-programming Array
Easy	Find minimum difference between any two elements	Amazon	array Sorting
Easy	Minimum number of jumps to reach end	Adobe Amazon Housing.com Moonfrog Labs Morgan Stanley OYO Rooms SAP Labs Walmart Labs	dynamic-programming
Hard	Number of palindromic paths in a matrix	Apple CodeNation Facebook Fanatics Google	dynamic-programming Matrix
Hard	Largest rectangular sub-matrix whose sum is 0	Amazon CodeNation Directi Expedia Facebook Google IBM Microsoft PayPal Uber	dynamic-programming Array Matrix
Medium	Maximum sum rectangle in a 2D matrix	Accolite Amazon Factset Samsung	dynamic-programming Array Matrix
Medium	Count minimum steps to get the given desired array	Capital One Citrix Coursera Synopsys Zycus	array
Easy	Maximum Sum Increasing Subsequence	Amazon Fanatics Microsoft Morgan Stanley	dynamic-programming Array
Easy	Largest Sum Contiguous Subarray	24*7 Innovation Labs Accolite Amazon DE Shaw Factset Flipkart Hike Housing.com MakeMyTrip MetLife Microsoft Morgan Stanley Ola Cabs Oracle OYO Rooms PayU Samsung Snapdeal Teradata Visa VMware Walmart Labs Zoho	dynamic-programming Array
Medium	Matrix Chain Multiplication	Amazon CodeNation DE Shaw Google Microsoft Uber	dynamic-programming Array Matrix
Easy	Binary Tree to Binary Search Tree Conversion	Adobe Amazon Apple Bloomberg Google Microsoft VMware	tree Depth First Search Tree Traversal
Medium	Sorted Linked List to Balanced BST	Amazon Facebook	tree
Easy	Sorted Array to Balanced BST	Adobe Amazon Apple Bloomberg Google Microsoft VMware	tree Array Depth First Search
Medium	Transform a BST to Greater sum Tree	Amazon Bloomberg Facebook	tree
Medium	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	Facebook	tree
Easy	Advantages of BST over Hash Table	Amazon GE Healthcare Qualcomm	tree
Easy	Construct BST from its given Level Order Traversal	Amazon Apple GE Healthcare MetLife Microsoft UHG Optum Yelp	tree Breadth First Search Tree Traversal
Easy	Construct BST from given Preorder Traversal	Amazon	tree Stack Tree Traversal
	BST to a Tree with Sum of all Smaller Keys	Bloomberg Drishti-Soft Microsoft ServiceNow Twitter Zopper	tree Tree Traversal
Medium	Find the node with minimum value in a Binary Search Tree	Amazon Bloomberg Microsoft	tree Breadth First Search Queue
Easy	Single Number	Amazon	algorithm Array
Hard	Shortest Palindrome	Amazon Delhivery Factset	string
Medium	Subset Leetcode	Amazon Apple Bloomberg ByteDance Facebook Google Microsoft Oracle	LeetCode Array Backtracking
Medium	Shuffle an Array	Amazon Facebook Google Microsoft Oracle	algorithm Array Hashing
Medium	Maximal Square	Adobe Amazon AppDynamics Apple Facebook Google IBM PayPal Twitter	matrix Array Dynamic Programming
Medium	Super Ugly Number	Google	dynamic-programming
Easy	Dividing Array into Pairs With Sum Divisible by K	Amazon Microsoft	array
Easy	Find Number of Employees Under every Employee	Accolite GE Healthcare Microsoft Myntra Qualcomm Synopsys Teradata	hashing
Medium	Count Distinct Elements in Every Window of Size K	Accolite Amazon Microsoft	array
Easy	Count Subsets Having Distinct Even Numbers	Cisco Expedia Myntra SAP Labs Taxi4Sure	array
Medium	Find Three Element From Different Three Arrays Such That a + b + c = sum	Amazon Databricks Directi JP Morgan Taxi4Sure Twilio Zoho	array Hashing
Easy	Special Number	Jio MAQ o9 solutions TCS	algorithm
Medium	Divisible Pairs Counting	Mahindra Comviva Oracle	dynamic-programming Array Hashing
Medium	Word Search	Amazon Apple Bloomberg ByteDance Cisco Facebook Intuit Microsoft Oracle ServiceNow Snapchat	matrix Array Backtracking
Hard	K Empty Slots	Amazon Google	algorithm Array
Medium	The Knapsack Problem	MakeMyTrip Snapdeal Visa Zoho	dynamic-programming Array
Medium	Bellman Ford Algorithm	Facebook Qualtrics	algorithm Dynamic Programming Graph
Medium	Huffman Coding	Amazon Bloomberg Google Morgan Stanley Samsung UHG Optum	algorithm Hashing
Medium	Data Structure Designing	Amazon DBOI Facebook Fanatics Fourkites
Medium	Longest Increasing Subsequence	Adobe Amazon Citrix CodeNation Facebook Google Microsoft Samsung Zoho	array Dynamic Programming
Easy	Reverse Bits	Apple Google Samsung	string
Medium	Construct Binary Tree from Given Inorder and Preorder Traversals	Amazon Apple Bloomberg ByteDance Citadel Facebook Google Microsoft Oracle	tree Depth First Search
Medium	Smallest Element Repeated Exactly K Times	Belzabar Komli Media Netskope Nvidia Opera ServiceNow UHG Optum	hashing Array String
Medium	K-th Distinct Element in an Array	Adobe Amazon Apple ByteDance eBay Expedia Facebook Google LinkedIn Microsoft Oracle Salesforce Spotify Walmart Labs	hashing
Easy	Cumulative Frequency of Count of Each Element in an Unsorted Array	Cadence India Fanatics LinkedIn Moonfrog Labs Pinterest	hashing Array Sorting
Medium	Group Words With Same Set of Characters	BlackRock Citrix IBM JP Morgan SAP Labs Xome	hashing String
Easy	First non Repeating Element	Belzabar Komli Media MetLife Snapdeal Sprinklr Wooker	hashing Array
Easy	Second Most Repeated Word in a Sequence	Amazon GE Healthcare Goldman Sachs Paytm Snapdeal UHG Optum	hashing String
Easy	Count Pairs Whose Products Exist in Array	Accolite Amazon BlackRock Moonfrog Labs Ola Cabs Snapchat Xome	array
Easy	Print All Distinct Elements of a Given Integer Array	Amazon MakeMyTrip Zoho	hashing Array Sorting
Easy	Pair of Positive Negative Values in an Array	Amazon Belzabar Honeywell Hulu Nvidia Robinhood Yelp	hashing Array
Easy	Remove Minimum Number of Elements Such That no Common Element Exist in both Array	Alation MetLife Oxigen Wallet ServiceNow Spotify	hashing Array
Easy	Maximum Occurring Character	Amazon Morgan Stanley PayU Zoho	hashing String
Easy	Count Pairs With Given Sum	Accolite Amazon Factset Hike	hashing Array Sorting
Medium	Insert Delete GetRandom	Affirm Amazon AppDynamics Apple Bloomberg Citadel Facebook Google Microsoft Nvidia Oracle Quera Twitter Two Sigma Yandex Zillow	algorithm Array Design
Medium	Merge Overlapping Intervals	Adobe Amazon Apple Bloomberg Cisco eBay Facebook Goldman Sachs Google IXL Microsoft Oracle Palantir Technologies PayPal Splunk Square Twitter Uber VMware Yandex	array Sorting
Medium	Decode Ways	Adobe Amazon Cisco Databricks Facebook Goldman Sachs Google JP Morgan Microsoft Morgan Stanley Oracle Square	dynamic-programming String
Hard	Median of Two Sorted Arrays	Adobe Amazon Apple Bloomberg ByteDance Facebook Goldman Sachs Google Microsoft Wish	array
Hard	Edit Distance	Amazon ByteDance Facebook Google Microsoft Palantir Technologies Square	string Dynamic Programming
Medium	Maximum Product Subarray	Amazon Apple Bloomberg Facebook Google Microsoft	array Dynamic Programming
Hard	Substring With Concatenation Of All Words	Amazon DE Shaw	string Hashing
Medium	Top K Frequent Words	Accolite Fourkites Infosys	string Hashing Trie
Medium	Reverse a Path in BST using Queue	Bloomberg Google Grofers HSBC Microsoft Target Corporation	tree Queue Tree Traversal
Medium	Print Ancestors of a Given Binary Tree Node Without Recursion	Accolite Amazon Fourkites	tree Stack Tree Traversal
Medium	Find Maximum of Minimum for Every Window Size in a Given Array	Amazon Directi Flipkart SAP Labs Zoho	array Stack
Medium	Identify and Mark Unmatched Parenthesis in an Expression	TCS	stack String
Easy	Iterative Depth First Traversal of Graph	Amazon Avalara Factset Fanatics Google Oracle	graph Depth First Search Stack
Medium	Minimum Bracket Reversals	Amazon Fanatics	stack Queue String
Medium	Expression Contains Redundant Bracket or Not	Amazon Paytm	string Stack
Easy	Reverse a Number Using Stack	MAQ Nokia o9 solutions	stack
Medium	Swap Nodes In Pairs	Amazon Microsoft Moonfrog Labs	linked-list
Medium	Zigzag Conversion	PayPal	string
Easy	Valid Palindrome	Infosys MAQ Nokia o9 solutions	string
Medium	Check if Two Expressions With Brackets are Same	Amazon Hike Oracle Snapdeal Walmart Labs Wipro Yatra Zoho	stack String
Medium	Priority Queue Using Singly Linked List	BrowserStack Hulu Mahindra Comviva Pocket Gems Soroco	queue
Easy	Reversing the First K elements of a Queue	BlackRock JP Morgan Robinhood Sprinklr Wooker ZScaler	queue Stack
Easy	Sorting a Queue without Extra Space	Belzabar GE Healthcare Mahindra Comviva MAQ Nvidia Qualcomm ServiceNow	queue Sorting
Medium	Longest Common Prefix Using Word by Word Matching	VMware	array String
Medium	Minimum Size Subarray Sum	Amazon Facebook Goldman Sachs Google Microsoft	array
Easy	Intersection of Two Arrays	Amazon ByteDance Facebook	array Hashing Sorting
Medium	Leetcode Permutations	Amazon Apple ByteDance eBay Facebook Google Microsoft Oracle	LeetCode Backtracking
Medium	Level order Traversal in Spiral Form	Adobe Amazon Apple Bloomberg Flipkart Microsoft Qualtrics ServiceNow	tree Breadth First Search Stack
Medium	Kth Smallest Element in a BST	Amazon Apple Bloomberg Facebook Google Oracle	tree
Medium	Search an Element in Sorted Rotated Array	Adobe Amazon Apple Bloomberg ByteDance eBay Expedia Facebook Google Microsoft Nvidia Oracle PayPal Paytm VMware Walmart Labs Zillow	array
Medium	Valid Parenthesis String	Amazon Facebook Oracle	string
Medium	Maximum Product Subarray	Amazon Apple Bloomberg Facebook Google Microsoft	array Dynamic Programming
Easy	Toeplitz Matrix	Facebook	matrix Array
Easy	Balanced Binary Tree	Amazon Bloomberg Google Microsoft	tree Depth First Search
Easy	Min Stack	Amazon Bloomberg Capital One DBOI Deutsche Bank Goldman Sachs Google Microsoft Oracle Walmart Labs	stack Design
Easy	Implement Stack using Queues	PayPal	stack Design Queue
Medium	Interval Tree	Amazon Google Intuit Oracle Qualtrics	tree
Medium	Set Matrix Zeroes	Amazon Apple Facebook Microsoft Oracle Paytm	matrix Array
Medium	Smallest Multiple of a Given Number	Alation American Express GE Healthcare Qualcomm Spotify
Medium	Construct Complete Binary Tree from its Linked List Representation	Amazon	tree Queue
Medium	Lowest Common Ancestor	Adobe Amazon Apple Bloomberg Facebook Google LinkedIn Microsoft Oracle Pony.ai Zillow	tree
Easy	Reversing a Queue using Recursion		queue
Medium	3 Sum	Adobe Amazon Apple Bloomberg Facebook Google Microsoft Oracle Qualtrics Tesla VMware	array
Easy	Averages of Levels in Binary Tree	Facebook	tree
Easy	Queue using Stacks	Accolite Adobe Amazon DE Shaw Flipkart Goldman Sachs InfoEdge InMobi MakeMyTrip MAQ Microsoft Morgan Stanley Oracle Walmart Labs	queue Stack
Medium	Longest Palindromic Subsequence	Amazon Facebook Microsoft	dynamic-programming String
Medium	Find The Duplicate Number	Amazon Apple Bloomberg Google Microsoft	array
Hard	Maximum Sum of 3 Non-Overlapping Subarrays	Facebook	array Dynamic Programming
Easy	Minimum Index Sum of Two Lists	Oracle Yelp	array Hashing
Medium	Reservoir Sampling	Amazon Facebook	algorithm Array
Easy	Reversing a Queue	Accolite Coursera Delhivery Factset GreyOrange Zoho	queue Stack
Medium	Split Array Into Consecutive Subsequences	Google	array
Easy	Lowest Common Ancestor in Binary Search Tree	Amazon Facebook LinkedIn Oracle	tree Tree Traversal
Hard	KMP Algorithm	Accolite Amazon Google MakeMyTrip MAQ Microsoft Oracle PayU	algorithm String
Easy	Most Frequent Element in an Array	Adobe Amazon Factset Fourkites Infosys MAQ	hashing Array Sorting
Medium	Evaluate Division	Amazon Bloomberg Facebook Google Microsoft Uber	algorithm Graph
Medium	Prim’s Algorithm	Amazon Cisco Samsung	algorithm Graph
Hard	Sudoku Solver	Amazon Apple DoorDash Google Intuit JP Morgan Microsoft Oracle	matrix Backtracking Hashing
Hard	Segment Tree	Amazon CodeNation Google Microsoft Uber	tree
Medium	Minimum Path Sum	Amazon Bloomberg Facebook Goldman Sachs Google Microsoft	matrix Array Dynamic Programming
Easy	Find Pair with Greatest Product in Array	Samsung	hashing Array
Hard	Minimum Cost to Hire K Workers	Google	algorithm
Medium	Find the Duplicate Element	Apple Bloomberg Google Microsoft	array
Easy	Fizz Buzz	Bloomberg Microsoft	algorithm String
Easy	Fizz Buzz Leetcode	Bloomberg Microsoft	LeetCode String
Medium	Arithmetic Expression Evaluation	Amazon Oracle	stack
Medium	Maximum Product of Indexes of Next Greater on Left and Right	Factset Fourkites InfoEdge	stack Array
Easy	Flood Fill LeetCode	Amazon Facebook Google	LeetCode Depth First Search Matrix
Easy	Check for Balanced Parentheses in an Expression	Amazon Hike Oracle Snapdeal Walmart Labs Wipro Yatra Zoho	stack String
Medium	Evaluation of Postfix Expression	Amazon Oracle	stack
Easy	Reverse a Stack Using Recursion	Factset Fourkites	stack
Easy	Find if an Expression has Duplicate Parenthesis or Not	Amazon Factset Oracle	stack String
Medium	How to Implement Stack Using Priority Queue or Heap?	Amazon Fanatics Fourkites	stack Queue
Medium	Iterative Tower of Hanoi	MAQ	stack
Medium	How to Efficiently Implement k Stacks in a Single Array?	Amazon Fourkites	stack Array
Medium	Find Maximum Depth of Nested Parenthesis in a String	Amazon Facebook	stack String
Medium	Expression Evaluation	Amazon Oracle	stack
Medium	How to Create Mergable Stack?	Amazon Factset Fanatics	stack
Medium	The Stock Span Problem	Amazon Delhivery MAQ	stack
Medium	Find Maximum Sum Possible Equal Sum of Three Stacks	Amazon Fanatics Fourkites	stack
Medium	Print Next Greater Number of Q queries	Amazon Factset Fanatics	stack Array
Medium	Check if an Array is Stack Sortable	Accenture Accolite Amazon	stack Array Sorting
Medium	Smallest Subarray With all Occurrences of a Most Frequent Element	Citrix Coursera OYO Rooms Qualtrics Synopsys Taxi4Sure	hashing Array
Medium	Find Top K (or Most Frequent) Numbers in a Stream	Accolite Amazon	hashing Array
Easy	Find the Only Repetitive Element Between 1 to N-1	CouponDunia Delhivery GreyOrange Info Edge LinkedIn Nagarro SAP Labs	array
Easy	Reverse a String using Stack	Accolite Capgemini Delhivery Fanatics Fourkites	stack String
Medium	Next Greater Frequency Element	Accenture Capgemini Microsoft UHG Optum	hashing Array Stack
Easy	Number of NGEs to the Right	Accolite Fanatics Fourkites	stack Array
Medium	Balanced Expression with Replacement	Amazon Hike Oracle Snapchat Snapdeal Walmart Labs Wipro Yatra Zoho	stack String
Easy	K Empty Slots LeetCode	Amazon Google	LeetCode Array
Hard	Trapping Rain Water	Adobe Amazon Apple Bloomberg Databricks Expedia Facebook Flipkart Goldman Sachs Google Microsoft Oracle Qualtrics ServiceNow Walmart Labs Yahoo	array Stack
Easy	Tower Of Hanoi	Factset Fourkites MAQ	algorithm Stack
Easy	Sliding Window Technique	Amazon Fanatics	algorithm Array
Easy	GCD Of Two Numbers	SAP SAP Labs TCS	algorithm
Easy	MiniMax Algorithm	Amazon Fanatics Game Theory	algorithm
Medium	Target Sum	Amazon Bloomberg Facebook	dynamic-programming Depth First Search
Medium	Counting Bits	Amazon Apple
Hard	Merge K Sorted Linked Lists	Adobe Amazon Apple Bloomberg ByteDance Databricks eBay Facebook Goldman Sachs Microsoft Oracle Palantir Technologies Twitter Uber Wish	linked-list
Medium	Wiggle Sort	PayPal	sorting
Medium	Decode String	Amazon Apple Bloomberg ByteDance Cisco eBay Facebook Google Hulu Microsoft Oracle	stack Depth First Search String
Medium	Print a Binary Tree in Vertical Order	Accolite Amazon BrowserStack Dell Flipkart Grofers MakeMyTrip Netskope Walmart Labs	tree Tree Traversal
Medium	Finding K closest element	Amazon	array
Easy	Priority Queue in C++	Amazon Fourkites Infosys Microsoft Oracle	queue
Easy	Priority Queue	Amazon Avalara CodeNation Goldman Sachs Google Microsoft	queue
Easy	Change the Array into Permutation of Numbers From 1 to N	Capgemini Delhivery Fourkites MAQ o9 solutions Publicis Sapient	hashing Array
Medium	Jump Game	Adobe Amazon Bloomberg Facebook Microsoft	array
Easy	Recursion	Amazon Infosys MAQ	stack
Easy	Binary Search Tree	Amazon DBOI Fourkites Infosys Microsoft	tree
Medium	Prefix to Infix Conversion	Amazon Avalara Fanatics	stack String
Easy	Postfix to Infix Conversion	Amazon Factset Microsoft	stack String
Medium	Prefix to Postfix Conversion	Amazon Factset Fanatics Oracle	stack String
Medium	Postfix to Prefix Conversion	Amazon Factset Fanatics Oracle	stack Array
Medium	Maximum Binary Tree	Amazon Google Microsoft Uber	tree
Medium	Nth Catalan Number	Amazon	algorithm Dynamic Programming
Medium	Combination Sum	Adobe Amazon Apple Bloomberg eBay Facebook Microsoft	array Backtracking
Medium	Next Permutation	Adobe Amazon Apple Bloomberg ByteDance Facebook Factset Flipkart Google Microsoft Morgan Stanley Salesforce Uber	string
Medium	Longest Common Subsequence	Amazon eBay Facebook Morgan Stanley	dynamic-programming String
Medium	Max Area of Island	Amazon Bloomberg DoorDash Facebook Google Oracle Palantir Technologies	graph Array Breadth First Search Depth First Search Matrix
Medium	Search in Sorted Rotated Array	Adobe Amazon Apple Bloomberg ByteDance eBay Expedia Facebook Goldman Sachs Google Microsoft Nvidia Oracle PayPal VMware Walmart Labs	array Sorting
Medium	Binary Tree zigzag level order Traversal	Adobe Amazon Apple Bloomberg eBay Flipkart Microsoft Qualtrics ServiceNow	tree Breadth First Search Queue Stack Tree Traversal
Hard	Recover Binary Search Tree	Amazon ByteDance Microsoft Oracle Uber	tree Depth First Search
Medium	Populating Next Right Pointers in Each Node	Amazon Bloomberg Facebook Microsoft	tree Breadth First Search Depth First Search
Medium	Top View of Binary Tree	Amazon Paytm Samsung Walmart Labs	tree Depth First Search Tree Traversal
Medium	Unique Paths	Amazon Bloomberg Facebook Goldman Sachs Google Microsoft Qualtrics	matrix Array Dynamic Programming
Easy	Merge Two Sorted Linked Lists	Adobe Amazon Apple Bloomberg Capital One Facebook Google IBM Microsoft Oracle	linked-list
Easy	Repeated Substring Pattern	Amazon Google	string
Medium	Letter Case Permutation	Amazon Bloomberg Spotify	string Backtracking
Hard	Find Median from data Stream	Amazon Apple ByteDance Facebook Goldman Sachs Google Microsoft Nvidia Oracle Salesforce Twitter VMware	algorithm Design
Medium	Level of Each node in a Tree from source node	Amazon Microsoft	tree Breadth First Search Depth First Search
Easy	Longest Common Prefix using Sorting	Adobe Amazon Apple Bloomberg eBay Facebook Google Microsoft	string
Medium	House Robber	Amazon Apple Cisco Expedia Google Microsoft Oracle	dynamic-programming Depth First Search
Easy	Maximum Subarray	Adobe Amazon Apple Bloomberg ByteDance Cisco Facebook Goldman Sachs Google JP Morgan JPMorgan LinkedIn Microsoft Oracle PayPal Paytm Uber	array Dynamic Programming
Medium	Sliding Window Maximum	Akuna Capital Amazon ByteDance Citadel Databricks Dropbox Expedia Facebook Google IBM Uber	array
Medium	Delete And Earn	Pocket Gems	array Dynamic Programming
Medium	Length of Longest Fibonacci Subsequence	Amazon	array Dynamic Programming
	Rainbow Table
Medium	Merging Intervals	Adobe Amazon Apple Bloomberg Cisco eBay Facebook Goldman Sachs Google IXL Microsoft Oracle Palantir Technologies PayPal Splunk Square Twitter Uber VMware Walmart Labs Yahoo Yandex	array Sorting
Easy	Backspace String Compare	Amazon CodeNation Facebook Google Microsoft Oracle	stack String
Medium	Word Break	Adobe Amazon Apple Bloomberg ByteDance eBay Facebook Google Microsoft Oracle Qualtrics Uber VMware Yahoo	LeetCode Dynamic Programming
Medium	Graph Cloning	Amazon Apple Bloomberg Facebook Google Microsoft Qualcomm Qualtrics Twitter Uber	graph Breadth First Search Depth First Search
Easy	Hamming Distance	Amazon Facebook	algorithm
Easy	First Bad Version	Amazon Cisco Facebook Google	array
Easy	Word Pattern	Amazon Capital One	string Hashing
Easy	Peak Index in a Mountain Array	Microsoft	array
Hard	Regular Expression Matching	Adobe Amazon Apple Bloomberg Coursera eBay Facebook Goldman Sachs Google Microsoft	string Backtracking Dynamic Programming
Medium	Reorganize String	Amazon eBay Facebook Google Microsoft Qualtrics	string Sorting
Medium	Find Duplicate Subtrees	Amazon Google	tree
Medium	String Compression	Amazon Apple Citrix Expedia Facebook Goldman Sachs IBM Microsoft Yandex	string
Medium	4Sum	Adobe Amazon Apple Goldman Sachs	array
Hard	Create Maximum Number	Apple	array Dynamic Programming
Easy	Degree of an array	VMware Walmart Labs	array
Medium	Queue Reconstruction by Height	Amazon Apple ByteDance Facebook Google	array Queue
Easy	Valid Parentheses	Adobe Amazon Apple Blizzard Bloomberg ByteDance Expedia Facebook Goldman Sachs Google IBM lyft Microsoft Oracle Spotify Zillow	string
Easy	Search Insert Position	Adobe	array
Medium	Find Peak Element	Adobe Amazon Apple Bloomberg ByteDance Facebook Google Quora Visa	array
Easy	Symmetric Tree	Adobe Amazon Apple Capital One eBay Facebook Fanatics Google MAQ Oracle	tree Breadth First Search Depth First Search
Medium	K-th Smallest Element in a Sorted Matrix	Amazon Facebook Google	matrix Array
Medium	Minimum Height Trees	Facebook	tree Depth First Search Graph
Hard	Longest Common Prefix using Trie	Adobe Amazon Apple Bloomberg eBay Facebook Google Microsoft	string Tree Trie
Hard	Valid Number	Amazon Facebook LinkedIn Oracle	string
Easy	Pascal Triangle Leetcode	Adobe Amazon Google Samsung	LeetCode Array
Easy	Trim a Binary Search Tree	Samsung	tree
Medium	Valid Triangle Number	Bloomberg Robinhood	array
Medium	Convert Sorted List to Binary Search Tree	Amazon Facebook	tree Depth First Search
Medium	Stone Game II Leetcode	Game Theory Google	LeetCode Dynamic Programming
Hard	Kruskal Algorithm	Amazon	graph Depth First Search
Easy	Number Of 1 bits	Adobe Box Cisco Facebook Qualcomm	algorithm
Easy	Power of Two	Apple	array
Easy	Merge Two Sorted Lists Leetcode	Adobe Amazon Apple Bloomberg Capital One Facebook Google IBM Microsoft Oracle	LeetCode Sorting
Medium	Validate Binary Search Tree	Amazon Apple Asana Atlassian Bloomberg ByteDance Citadel Facebook Microsoft Oracle Qualtrics VMware Yahoo	tree Depth First Search
Hard	Reverse Nodes in K-Group	Adobe Amazon Apple ByteDance Facebook Microsoft	linked-list
Medium	Stone Game LeetCode	Adobe Apple Google	LeetCode Dynamic Programming
Medium	Maximum size subarray sum equals k	Facebook Microsoft	array Hashing
Easy	Path Sum	Amazon Apple Facebook Microsoft Oracle	tree Depth First Search
Hard	Find the Closest Palindrome number	Amazon Apple	string
Easy	Count and Say	Amazon Apple Bloomberg Facebook Google Microsoft VMware	string
Medium	Level Order Traversal of Binary Tree	Amazon Apple Bloomberg Cisco Facebook Microsoft	tree Breadth First Search Queue
Easy	Tree Traversal (Preorder, Inorder & Postorder)	Adobe Amazon MAQ Oracle Snapdeal	tree Tree Traversal
Medium	LRU Cache Implementation	Adobe Amazon Apple Bloomberg ByteDance Capital One Cisco Citadel Cohesity Cruise Automation Dropbox eBay Expedia Facebook Goldman Sachs Google Microsoft Nutanix Oracle PayPal Pinterest Salesforce Snapchat Tesla Twilio Uber VMware Walmart Labs Wish Zillow	algorithm Design
Medium	Merge Sort	Amazon Apple Boomerang Commerce Goldman Sachs Grofers Microsoft Oracle Paytm Qualcomm Snapdeal Target Corporation	sorting
Easy	Find unique character in a string	Amazon Apple Bloomberg Facebook Goldman Sachs Google Microsoft Oracle Zillow	string Hashing
Medium	Integer to Roman	Amazon Apple Bloomberg Microsoft Oracle	string
Medium	Valid Sudoku	Amazon Apple Facebook Google Microsoft Oracle Pinterest Roblox Uber	matrix Hashing
Medium	Palindrome Partitioning	Amazon Facebook Google	dynamic-programming Backtracking Depth First Search
Medium	Add two numbers	Amazon Apple Bloomberg Coupang DocuSign Facebook Google Microsoft Uber VMware Walmart Labs Yahoo	linked-list
Easy	Next greater element	Amazon Bloomberg	array Stack
Medium	Deletion in a Binary Tree	Amazon Bloomberg Microsoft	tree
Medium	Unique Binary Search Trees	Amazon Bloomberg Google	tree Dynamic Programming
Medium	Floyd Warshall Algorithm	Samsung	graph Dynamic Programming
Medium	Bipartite Graph	Samsung	graph Breadth First Search Depth First Search
Medium	Sieve of Eratosthenes	Amazon Apple Capital One GE Healthcare Google MAQ Microsoft Qualcomm VMware	algorithm Dynamic Programming
Medium	Strongly Connected Component	Visa	graph Depth First Search
Hard	N queen problem	Accolite Amazon Amdocs Apple ByteDance Facebook MAQ Microsoft Twitter Visa	matrix Backtracking
Hard	Rabin Karp Algorithm	Accolite Amazon MakeMyTrip MAQ Oracle PayU	string
Easy	Alien Dictionary	Amazon Facebook Walmart Labs	LeetCode Hashing
Hard	Guess The Word	Amazon Google	array String
Medium	Decision Tree		tree
Medium	New 21 Game	Apple Google	dynamic-programming
Medium	Verify Preorder Serialization of a Binary Tree	Google	tree Stack
Easy	Missing Number	Amazon Apple Capital One Cisco Facebook Microsoft	array
Easy	Merge Sorted Array	Amazon Amdocs Apple Bloomberg Brocade Facebook Goldman Sachs IBM Juniper Networks LinkedIn Microsoft Quikr Snapdeal Synopsys Visa Zoho	array Sorting
Medium	Partition Equal Subset Sum	Amazon Facebook Google	array Dynamic Programming
Easy	Last Stone Weight	Amazon	array
Medium	Sort Colors	Amazon eBay Expedia Facebook Goldman Sachs Nvidia Oracle	array Sorting
Medium	Rotate Array	Amazon Apple MakeMyTrip MAQ Microsoft Oracle SAP SAP Labs Wipro	array
Medium	Applications of Breadth First Search and Depth First Search		graph Breadth First Search Depth First Search
Medium	Container with Most Water	Adobe Amazon Apple Bloomberg Facebook Flipkart Walmart Labs	algorithm Array
Hard	Distinct Subsequences	Amazon Bloomberg Mathworks	dynamic-programming String
Hard	Matrix Chain Multiplication using Dynamic Programming	Amazon Microsoft	matrix Array Dynamic Programming
Medium	Subarray Sum Equals k	Adobe Amazon American Express Bloomberg eBay Facebook Goldman Sachs Google Microsoft Twilio Yahoo	array
Hard	Infix to Postfix	Amazon Paytm Samsung VMware	array Stack
Easy	Isomorphic Strings	Amazon Apple Facebook Intel	string Hashing
Easy	Binary Tree Data Structure	DBOI Factset Infosys MAQ Oracle	tree
Easy	Climbing stairs	Adobe Amazon Apple Bloomberg Expedia Goldman Sachs	dynamic-programming
Medium	Topological Sorting	Accolite Amazon Flipkart Microsoft Moonfrog Labs Morgan Stanley OYO Rooms Samsung	sorting Depth First Search Graph
Medium	Insertion Sort	Accenture Cisco Dell Grofers Juniper Networks MAQ Veritas	sorting Array
Easy	Self Dividing Numbers	Adobe Epic Systems Tesla
Medium	Quick Sort	Adobe Goldman Sachs HSBC Qualcomm Samsung SAP SAP Labs Target Corporation	sorting Array
Easy	Types of Binary Tree	Delhivery Infosys MAQ	tree
Easy	Insertion in a Binary Tree	Delhivery Factset FreeCharge GE Healthcare InfoEdge	tree Breadth First Search Queue
Medium	Perform String Shifts Leetcode	Amazon Facebook Microsoft	LeetCode String
Easy	BFS vs DFS for Binary Tree	Amazon Infosys MAQ TCS	graph Breadth First Search Depth First Search Tree
Easy	Depth First Search (DFS) for a Graph	GE Healthcare Infosys MAQ o9 solutions UHG Optum	graph Depth First Search
Easy	Breadth First Search (BFS) for a Graph	Amazon Cadence India GE Healthcare Housing.com Pocket Gems UHG Optum	graph Breadth First Search Queue
Easy	String comparison containing wildcards	Accenture Amazon Ola Cabs	string
Hard	Serialize and Deserialize Binary Tree	Amazon Bloomberg Citadel eBay Facebook Google Microsoft Oracle Qualtrics Quora Square Uber Walmart Labs	tree
Easy	Fibonacci numbers	Apple DBOI Google Infosys JP Morgan MAQ o9 solutions SAP Labs	algorithm
Medium	Graph and its representation	Delhivery Factset Infosys MAQ o9 solutions	graph
Easy	Reverse a linked list	Accolite Adobe Amazon MakeMyTrip Microsoft Qualcomm Samsung SAP SAP Labs Snapdeal Zoho	linked-list
Easy	Subset sum problem	Adobe Amazon Ameyo	dynamic-programming Array
Easy	Circular Queue	Infosys MAQ o9 solutions Oracle	array Queue
Medium	Heap Sort	24*7 Innovation Labs Amazon Apple Belzabar Intuit Oracle Samsung SAP SAP Labs Visa
Easy	Ugly Numbers	Delhivery Goldman Sachs Paytm	dynamic-programming
Easy	Dynamic Programming Basics	Infosys MAQ	dynamic-programming
Medium	Dijkstra Algorithm	Accolite Adobe Amazon Cisco Interactive Solutions Morgan Stanley Samsung Vizury	algorithm Graph
Medium	Coin Change Problem	Amazon Apple BlackRock Bloomberg ByteDance Capital One Facebook Goldman Sachs Google Oracle Walmart Labs	dynamic-programming Array
Easy	Multiplication of Two Matrices	Amazon Apple Facebook Wish	matrix Array
Easy	Subtraction of Two Matrices	Capgemini MAQ o9 solutions	matrix Array
Easy	Check if Two given Matrices are Identical	Affirm Ameyo DiDi Pony.ai	matrix Array
Easy	Addition of Two Matrices	Alation Asana Wish	matrix Array
Easy	Transpose of a Matrix	ServiceNow Veritas	matrix Array
Medium	Check whether Strings are K Distance Apart or Not	Amazon Deutsche Bank Facebook GE Healthcare Microsoft	string Dynamic Programming Matrix
Easy	Program to Toggle all Characters in a String	Capgemini InfoEdge MAQ Oxigen Wallet	string
Easy	Check length of a String is Equal to the Number Appended at its Last	CodeNation Fourkites Microsoft UHG Optum	string
Easy	Generate all Binary Strings Without Consecutive 1’s	Amazon GE Healthcare Snapdeal Target Corporation	string
Medium	Check if all Rows of a Matrix are Circular Rotations of Each Other	Accenture Cadence India Citadel FreeCharge Microsoft Pinterest	string Matrix
Easy	Sort a String According to Another String	Accenture Accolite Adobe Amazon FreeCharge InfoEdge Microsoft Salesforce	string Sorting
Medium	Check if String can Become Empty by Recursively Deleting given Substring	Adobe Delhivery GE Healthcare MakeMyTrip ServiceNow Spotify UHG Optum	string
Easy	Smallest Palindrome after Replacement	Adobe Arcesium Flipkart GE Healthcare ZScaler	string
Medium	Check if String Follows Order of Characters by a Pattern or not	Adobe Amazon GreyOrange InfoEdge Microsoft	string
Easy	Split Four Distinct Strings	Accenture Adobe GoDaddy Grofers Honeywell Quora Splunk	string
Easy	Even Substring Count	Coursera Deutsche Bank OYO Rooms Yahoo Yandex Zoho	string
Medium	Reverse String Without Temporary Variable	Adobe Amazon Google Hulu Microsoft Moonfrog Labs	string
Easy	Recursive Palindrome Check	Capgemini Factset Infosys MAQ o9 solutions Oracle Square	string
Easy	Minimum Characters to be Removed to Make a Binary String Alternate	Coursera Fourkites Hike MAQ o9 solutions Pocket Gems Taxi4Sure	string
Medium	Print all Palindromic Partitions of a String	Amazon Facebook Google	string Backtracking Depth First Search Dynamic Programming
Easy	Count the Pairs at Same Distance as in English Alphabets	Adobe Amazon Dropbox GE Healthcare OYO Rooms	string
Medium	Minimum Characters to be Added at Front to Make String Palindrome	Amazon Factset Google Microsoft SAP SAP Labs	string
Medium	Convert a String that is Repetition of a Substring of Length K	Accenture Adobe American Express Databricks FreeCharge	string Hashing
Medium	Nth Character in Concatenated Decimal String	Adobe Oracle	string
Easy	Kth Non-repeating Character	Amazon Apple Bloomberg Facebook Goldman Sachs Google Microsoft Oracle Zillow	string Hashing
Easy	Compare Two Version Numbers	Adobe Delhivery GE Healthcare GreyOrange MakeMyTrip Wooker Zoho	string
Easy	Remove Minimum Characters so that Two Strings Become Anagrams	Amazon FreeCharge	string
Medium	Generate all Binary Strings from Given Pattern	Amazon Google Microsoft	string
Hard	Print all Possible Ways to Break a String in Bracket Form	Amazon Bloomberg GE Healthcare Juniper Networks	string
Easy	Caesar Cipher	Amazon GE Healthcare Grofers UHG Optum	string
Easy	Longest Common Subsequence with Permutations	Adobe Honeywell Hulu JP Morgan Oracle Zoho	string
Easy	Perfect Reversible String	MakeMyTrip MAQ Walmart Labs Zoho	string
Easy	Longest Palindrome can be Formed by Removing or Rearranging Characters	Adobe Amazon Delhivery InfoEdge UHG Optum	string Hashing
Hard	Longest Common Prefix Word by Word Matching	Adobe Amazon Apple Bloomberg eBay Facebook Google Microsoft VMware Yahoo	string
Hard	Longest Common Prefix using Character by Character Matching	Adobe Amazon Apple Bloomberg eBay Facebook Google Microsoft VMware Yahoo	string
Medium	Permutations of a Given String Using STL	Amazon Apple ByteDance eBay Facebook Google Microsoft Oracle	string
Easy	Calculate Sum of all Numbers Present in a String	Adobe Fanatics MAQ	string
Hard	Longest Common Prefix using Divide and Conquer	Accenture Accolite Amazon Fanatics Google	string
Easy	Lower Case To Upper Case	Adobe Apple Google	string
Hard	Longest Common Prefix Using Binary Search II	Adobe Amazon Apple Bloomberg eBay Facebook Google Microsoft VMware Yahoo	string
Easy	Print Shortest Path to Print a String on Screen	Accolite	string Matrix
Easy	Remove Extra Spaces from a String	Capgemini Infosys MAQ o9 solutions TCS	string
Easy	Change Gender of a given String	Adobe Factset	string
Medium	Count Number of Substrings with K Distinct Character’s	LinkedIn Zoho	string Hashing
Easy	Removing Spaces from a String using stringstream	Capgemini Hulu o9 solutions TCS	string
Easy	Pangram Checking	Factset o9 solutions Pocket Gems Zoho	string Hashing
Medium	Repeated Subsequence of Length Two or More	Adobe	string
Hard	Palindrome Permutations of a String	Amazon Facebook	string
	Split a string		string
	1`s and 2`s complement of binary number		string
	Longest Common Extension		string
	Convert string1 to string2 in one edit		string
	Find First non-repeating character in a string		string
	Remove recurring digits in a given number		string
	Recursively print all the sentences that can be formed from list of word lists		string
Medium	Online Algorithm for Checking Palindrome in a Stream	Accolite Adobe Zenefits	string
Easy	Check if Two given Strings are Isomorphic to each other	Accolite Adobe Amazon GE Healthcare Goldman Sachs InfoEdge Oracle UHG Optum	string
Hard	Length of Longest valid Substring	Adobe Amazon Apple Bloomberg ByteDance Citadel eBay Facebook Google Microsoft Oracle Uber VMware Yahoo	string
	Program to add two binary digits		string
	Recursive Implementation of atoi()		string
	Reverse a string without affecting special characters		string
	Recursive function to do substring search		string
	Print Longest common subsequence		string
	Rotate string to get lexicographically minimum string		string
	Number of sub-strings which recursively add up to 9		string
	Palindrome string (number)		string
	Print all possible words from phone digits		string
	Shortest Superstring Problem		string
	Transform one string to another using minimum number of given operations		string
	Print string of odd length in ‘X’ format		string
	Minimum insertions to form a shortest palindrome		string
	print all palindromic partitions		string
	Check rearranged string can form a palindrome		string
	Palindromes in a given range		string
	String(represents an integer) to value		string
	Count the number of words		string
	Print all anagrams together in a sequence of words		string
	Lexicographic rank of string		string
	Remove spaces from a string		string
	Find, second, frequent, character		string
	Find the second most frequent character		string
	Check if a given string is a rotation of a palindrome		string
	Sort an array of strings		string
	Recursively remove all adjacent duplicates		string
	Remove ‘b’ and ‘ac’ from a given string		string
	wildcard character matching		string
	Longest Palindromic Substring		string
	Given string is interleaving of two other strings or not		string
	Print all permutations with repetition		string
	Run length encoding		string
	List items containing all characters of a given word		string
	Write a program to print all permutations of a given string		string
	Check whether two strings are anagram of each other		string
	Print all interleavings of given two strings		string
	Print all duplicates in the input string		string
	A Program to check if strings are rotations of each other or not		string
	Given a string find its first non-repeating character		string
	Reverse words in a given string		string
	Find the smallest window in a string containing all characters of another string		string
	Divide a string in N equal parts		string
	Print Reverse of a string (Recursion)		string
	Remove characters from first string which are in second		string
	Sorting the array of strings		string
	Remove duplicates from a string		string
	Concatenation of two strings		string
	Reverse a String		string
	Most repeating character in a string		string
	Given a sorted array and a number x, find the pair in array whose sum is closest to x		array
	Find the subarray whose sum is equal to a given number X		array
	Basic SQL Interview Questions		sql-interview-questions
	Aggregate Functions in SQL		sql-interview-questions
	DB Locks in SQL		sql-interview-questions
	Indexes in SQL Interview Questions		sql-interview-questions
	Joins in SQL Interview Questions		sql-interview-questions
	Keys in SQL		sql-interview-questions
	Optimization in SQL		sql-interview-questions
	Oracle in SQL		sql-interview-questions
	Parameterized Query in SQL		sql-interview-questions
	Privileges and Roles in SQL		sql-interview-questions
	SQL Query Interview Questions		sql-interview-questions
	SQL Server Interview Questions		sql-interview-questions
	Arrange Even and Odd number such that Odd comes after Even		array
Easy	Minimum number of Merge Operations to make an Array Palindrome	Amazon	array
Easy	Form Minimum Number from Given Sequence of D’s and I’s	Amazon Goldman Sachs	array Stack String
Medium	Longest Span with same Sum in two Binary Arrays II	Accenture Cisco Indeed Kuliza SAP Labs Yandex	array Hashing
Easy	Find the Subarray of given length with Least Average	Accenture Accolite Amazon Factset Fourkites Paytm Zoho	array
Easy	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	Accolite Amazon GE Healthcare Info Edge Zoho	array
Medium	Merge K Sorted Arrays and Print Sorted Output	Amazon GE Healthcare Google Microsoft	array
Medium	Find the Minimum Element in a Sorted and Rotated Array	Amazon Bloomberg Facebook Goldman Sachs Microsoft Oracle	array
Medium	Find the point where a monotonically increasing function becomes positive first time	American Express	array
Medium	Print all Possible Combinations of R Elements in a given Array of size N	GreyOrange Oxigen Wallet	array
Medium	Sort Elements by Frequency II	Amazon Oracle Zoho Zycus	array Hashing Sorting
Easy	Stock Buy Sell to Maximize Profit	Amazon Apple Facebook Microsoft Morgan Stanley PayPal Qualtrics TCS Uber	array
Medium	Merge Overlapping Intervals II	Adobe Amazon Apple Bloomberg Cisco eBay Facebook Goldman Sachs Google IXL Microsoft Oracle Palantir Technologies PayPal Qualtrics Salesforce Splunk Twitter Uber VMware Walmart Labs Yahoo Yandex	array Sorting
Medium	Maximum Subarray Sum using Divide and Conquer	Adobe Amazon Apple Bloomberg ByteDance Cisco Facebook Goldman Sachs Google JPMorgan LinkedIn Microsoft Oracle PayPal Paytm Uber	array
Hard	Pancake Sorting Problem	Amazon Facebook Microsoft Square Uber	array Sorting
Medium	Pancake Sorting	Amazon Facebook Microsoft Square Uber	array Sorting
Medium	Arrange given Numbers to Form the Biggest Number II	Adobe Amazon Apple ByteDance Facebook Google MakeMyTrip Microsoft Nvidia Oracle Paytm VMware Zoho	array String
Medium	Iterative Implementation of Quick Sort	Amazon Apple Bloomberg	array Sorting
Easy	Shuffle a given Array	Amazon Apple Bloomberg Facebook Google Microsoft Oracle Two Sigma Yahoo	array
Medium	Find the Row with Maximum Number of 1’s	24*7 Innovation Labs Amazon Microsoft Paytm	array Matrix
Easy	Sorting a K Sorted Array	Amazon Apple Bloomberg	array Sorting
Medium	Maximum Product Subarray II	Amazon Apple Bloomberg Facebook Google LinkedIn Microsoft	array Dynamic Programming
Medium	Largest Subarray with Equal Number of 0’s and 1’s	Adobe Amazon Apple Facebook Google Quora Robinhood	array Hashing
Easy	Find the two Numbers with Odd Occurrences in an Unsorted Array	Accolite Factset Google Oracle	array
Medium	Maximum Sum Increasing Subsequence	Adobe Amazon Apple Atlassian Bloomberg ByteDance Citrix CodeNation Coupang eBay Facebook Google IBM Microsoft Nagarro Oracle Uber Yahoo	array Dynamic Programming
Medium	Implement Two Stacks in an Array	24*7 Innovation Labs Accolite Google Microsoft Samsung Snapdeal	array Stack
Medium	Number of Smaller Elements on Right Side	Adobe Amazon Apple Bloomberg Google Microsoft Oracle Uber	array Sorting
Easy	Increasing Subsequence of Length three with Maximum Product	Amazon Apple Cisco Citadel Facebook Intuit Uber	array
Medium	Elements Appear more than N/K times in Array	Adobe Amazon Apple Bloomberg Facebook Google Microsoft Zenefits	array Hashing
Medium	Find the Peak Element from an Array	Amazon Apple Bloomberg ByteDance DE Shaw Facebook Google Microsoft Quora Uber Walmart Labs	array
Easy	Rearrange Positive and Negative Numbers Alternatively in Array	Amazon Apple Bloomberg Capital One Cisco Facebook Google Morgan Stanley Oracle VMware	array
Easy	Find the Maximum Repeating Number in Array	Adobe Amazon Apple Bloomberg Citadel eBay Facebook Goldman Sachs Google Intuit Microsoft Nutanix PayPal Salesforce VMware Wish Yahoo	array
Medium	Tug of War	Accolite Amazon	array Backtracking
Medium	First Circular Tour to Visit all the Petrol Bunks	Amazon Factset Microsoft Morgan Stanley Zoho	array
Medium	Count Possible Triangles	Amazon LinkedIn Wipro	array
Medium	Maximum Circular Subarray Sum	Amazon Facebook LinkedIn Two Sigma Uber	array
Medium	Four Elements that Sum to Given	Adobe Amazon Apple Bloomberg Goldman Sachs Google Microsoft Yahoo	array Hashing Sorting
Medium	Maximum Length of Chain Pairs	Amazon Bloomberg Uber	array Dynamic Programming
Easy	Find Pair with Given Difference	Amazon Bloomberg Citrix Expedia Goldman Sachs Microsoft Nvidia Oracle Salesforce Twilio Twitter Visa VMware	array Sorting
Medium	Partition Problem	Accolite Adobe Amazon Apple Bloomberg ByteDance eBay Facebook Goldman Sachs Google Microsoft VMware Yahoo	array Dynamic Programming
Medium	The Celebrity Problem	Amazon Apple Fab Facebook Flipkart Google LinkedIn Microsoft Nvidia Palantir Technologies Pinterest Snapchat Uber UHG Optum VMware Zoho	array Matrix Stack
Medium	Find a Sorted Subsequence of size 3	Amazon Bloomberg Facebook Factset Google Oracle Uber Yahoo	array
Medium	Subarray with Given Sum	Adobe Amazon American Express Apple Bloomberg ByteDance Coupang eBay Facebook Goldman Sachs Google LinkedIn Microsoft Oracle Quera Twilio Uber Wish Yahoo Yandex	array Hashing
Medium	Maximum Element in an Array which is Increasing and then Decreasing	Adobe Amazon Goldman Sachs Microsoft Paytm	array
Easy	Count Minimum Steps to Get the given Array	Amazon Fanatics Oracle	array
Easy	Find the Lost Element From a Duplicated Array	Accolite Adobe Amazon Apple Bloomberg Capital One Cisco eBay Facebook Goldman Sachs Google IBM JP Morgan Microsoft Nvidia Oracle PayPal ServiceNow Yandex	array Hashing
Easy	Rearrange given Array in Maximum Minimum Form	Amazon Apple Bloomberg Capital One Cisco Facebook Google Morgan Stanley Oracle VMware	array
Medium	Subarray and Subsequence	Amazon Apple Facebook Google Microsoft	array
Medium	Merge Two Sorted Arrays	Adobe Amazon Apple Bloomberg ByteDance Cisco eBay Facebook Goldman Sachs Google IBM LinkedIn lyft Microsoft Oracle Uber VMware Walmart Labs Wish Yahoo Yandex	array
Medium	Count of Triplets With Sum Less than Given Value	Adobe Amazon Apple Bloomberg ByteDance Cisco Citadel Citrix DoorDash eBay Facebook Goldman Sachs Google Hulu IBM Infosys Mathworks Microsoft Oracle PayPal Qualtrics Samsung ServiceNow Splunk Square Tencent Tesla Uber Visa VMware Walmart Labs Yahoo Zoho	array
Easy	Reorder Array Using Given Indexes	Google	array
Easy	Next Greater Element in an Array	Amazon Apple Bloomberg CouponDunia Facebook Google Microsoft Oracle PayU Samsung Snapdeal Twitter Zoho	array Stack
Easy	Merging Two Sorted Arrays	Adobe Amazon Apple Bloomberg ByteDance Cisco eBay Facebook Goldman Sachs Google IBM LinkedIn lyft Microsoft Oracle Uber VMware Walmart Labs Wish Yahoo Yandex	array
Easy	Reorder an Array According to the Given Indexes	Google	array
Easy	Find a Fixed Point in a Given Array	Amazon Factset Hike