Rotate String LeetCode Solution

Difficulty Level Easy
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Problem Statement

Rotate String LeetCode Solution – Given two strings s and goal, return true if and only ifcan become goal after some number of shifts on s.

shift on s consists of moving the leftmost character of s to the rightmost position.

  • For example, if s = “abcde”, then it will be “bcdea” after one shift.


Example 1:


 s = "abcde", goal = "cdeab"





We add s+s like in the first example abcde+abcde= abcdeabcde and clearly, we can see it contains all the left shift os s and simply we can return the contains method from it.


Java Program of Rotate String:

class Solution {
public boolean rotateString(String s, String goal) 
    return (s.length()==goal.length() && (s+s).contains(goal));

Python Program of Rotate String:

class Solution :
    def  rotateString(self, s,  goal) :
        return (len(s) == len(goal) and  goal in (s + s) )

Complexity Analysis for Rotate String LeetCode Solution

Time Complexity

The time complexity of the above code is O(1) because we don’t do any traversing.

Space Complexity

The space complexity of the above code is O(1) because no matter how large our input is, the output always takes the same amount of space because of the way that it’s structured. Also, the output only needs to return true or false so the output itself isn’t derived by traversing anything.

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625Smallest Good Base163
626Minimum Depth of Binary Tree Leetcode Solution163
627Longest Substring with At Most K Distinct Characters LeetCode Solution163
628Sort Array By Parity LeetCode Solution163
629Defanging an IP Address Leetcode Solution163
630Kth Missing Positive Number Leetcode Solution162
631Isomorphic Strings162
632Distance of nearest cell having 1 in a binary matrix162
633Find Maximum Level sum in Binary Tree162
634House Robber162
635Coin Change Problem162
636Valid Palindrome II Leetcode Solution161
637Iterative Method to find Height of Binary Tree161
638Tracking current Maximum Element in a Stack161
639Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest161
640Minimum Cost to Hire K Workers161
641Reverse a stack without using extra space in O(n)160
642GCD Of Two Numbers160
643Longest Increasing Subsequence160
644Delete consecutive same words in a sequence160
645Count Good Nodes in Binary Tree Leetcode Solution160
646Sum of All Odd Length Subarrays Leetcode Solution160
647Non-overlapping sum of two sets160
648Optimal Account Balancing LeetCode Solution160
649Binary Tree Zigzag Level Order Traversal LeetCode Solution160
650Check If It Is a Straight Line Leetcode Solution160
651Power of Four Leetcode Solution160
652Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions160
653Maximum Consecutive Numbers Present in an Array160
654Check If Two String Arrays are Equivalent Leetcode Solution159
655K Empty Slots159
656Moving Average from Data Stream Leetcode Solution159
657Number of Provinces Leetcode Solution159
658Best Time to Buy and Sell Stock with Cooldown Leetcode Solution159
659Merge Two Balanced Binary Search Trees159
660Convert an array to reduced form159
661Ugly Number Leetcode Solution159
662Largest Sum Contiguous Subarray158
663Maximum Number of Coins You Can Get Leetcode Solution158
664Letter Combinations of a Phone Number158
665Wiggle Sort158
666Check if a queue can be sorted into another queue using a stack158
667Reverse Only Letters LeetCode Solution158
668Strobogrammatic Number LeetCode Solution158
669String to Integer (atoi) LeetCode Solution158
670Employee Free Time LeetCode Solution158
671Number of Dice Rolls With Target Sum LeetCode Solution158
672Flipping an Image LeetCode Solution158
673Form minimum number from given sequence158
674Queries for counts of array elements with values in given range158
675Find Largest d in Array such that a + b + c = d157
676Reducing Dishes LeetCode Solution157
677Print the Fibonacci numbers in reverse order157
678Find the Smallest Divisor given a Threshold Leetcode Solution157
679Longest Increasing Path in a Matrix LeetCode Solution157
680Subset Sum Leetcode157
681Longest Substring with At Least K Repeating Characters LeetCode Solution157
682Sum of f(a[i], a[j]) over all pairs in an array of n integers157
683Construct BST from given Preorder Traversal157
684How to Create Mergable Stack?157
685Path With Maximum Minimum Value LeetCode Solution157
686To Lower Case Leetcode Solution157
687Inorder Successor of a node in Binary Tree157
688Increasing Decreasing String Leetcode Solution157
689Partition Labels LeetCode Solution157
690Lucky Numbers in a Matrix Leetcode Solution157
691Reorganize String157
692Find whether an array is subset of another array156
693Find the Distance Value Between Two Arrays Leetcode Solution156
694Unique Paths II Leetcode Solution156
695Maximum Number of Occurrences of a Substring Leetcode Solution156
696Find Leaves of Binary Tree LeetCode Solution156
697Reversing a Queue using Recursion156
698Valid Perfect Square Leetcode Solution156
699Robot Room Cleaner Leetcode Solution156
700Valid Palindrome156
701Find pairs with given sum such that elements of pair are in different rows155
702Delete Nth node from the end of the given linked list155
703Permutation Sequence LeetCode Solution155
704Merge Two Binary Trees LeetCode Solution155
705Edit Distance LeetCode Solution155
706Dynamic Programming Basics155
707Populating Next Right Pointers in Each Node155
708Recover Binary Search Tree155
709Binary Tree zigzag level order Traversal155
710Partition Array Into Three Parts With Equal Sum Leetcode Solution155
711Keyboard Row Leetcode Solution155
712Majority Element II Leetcode Solution155
713Remove Invalid Parentheses Leetcode Solution155
714Maximum Product of Two Elements in an Array Leetcode Solution155
715Reservoir Sampling155
716BFS vs DFS for Binary Tree155
717Maximum Product of Three Numbers LeetCode Solution154
718Restore IP Addresses Leetcode Solution154
719Find the node with minimum value in a Binary Search Tree154
720Decompress Run-Length Encoded List Leetcode Solution154
721Rank Transform of an Array Leetcode Solution154
722Add and Search Word – Data structure design LeetCode154
723Sort Array by Increasing Frequency Leetcode Solution154
724Hamming Distance Leetcode Solution154
725Convert a Number to Hexadecimal Leetcode Solution153
726Factorial Trailing Zeroes Leetcode Solution153
727Numbers with prime frequencies greater than or equal to k153
728String Compression LeetCode Solution153
729Stack Permutations (Check if an array is stack permutation of other)153
730Bulb Switcher LeetCode Solution152
731Sorted Linked List to Balanced BST152
732Longest Span with same Sum in two Binary arrays152
733Queue based approach for first non-repeating character in a stream152
734Find the largest multiple of 3152
735Deletion in a Binary Tree152
736Binary Tree Maximum Path Sum LeetCode Solution152
737Find unique character in a string152
738Symmetric Tree Leetcode Solution152
739Best Meeting Point LeetCode Solution152
740Check If Array Pairs Are Divisible by k LeetCode Solution151
741Non-decreasing Array LeetCode Solution151
742Race Car LeetCode Solution151
743Minimum Cost For Tickets Leetcode Solution151
744Find All Duplicates in an Array LeetCode Solution151
745Generate all possible sorted arrays from alternate elements of two given sorted arrays151
746Invert Binary Tree LeetCode Solution151
747Largest subarray with equal number of 0s and 1s151
748Binomial Coefficient151
749Word Pattern LeetCode Solution151
750Search in a Binary Search Tree Leetcode Solution151
751Find Maximum Depth of Nested Parenthesis in a String151
752Finding K closest element151
753Find Median from Data Stream LeetCode Solution151
754Minimum Distance Between BST Nodes Leetcode Solution151
755Maximum 69 Number Leetcode Solution151
756Minimum Height Trees151
757Linked List Cycle151
758Find if Path Exists in Graph Leetcode Solution150
759Perform String Shifts Leetcode150
760Search a 2D Matrix II Leetcode Solution150
761First Unique Character in a String LeetCode Solution150
762Maximum Length of a Concatenated String with Unique Characters Leetcode Solution150
763Number of Islands II LeetCode Solution150
764Minimize Maximum Pair Sum in Array LeetCode Solution150
765Remove Duplicates from Sorted List LeetCode Solution150
766Find Pair with Greatest Product in Array150
767Remove Nth Node From End of List Leetcode Solution150
768Maximum Depth of N-ary Tree Leetcode Solution150
769Student Attendance Record I Leetcode Solution150
770Bubble sort using two Stacks150
771Count quadruples from four sorted arrays whose sum is equal to a given value x150
772N-Queens LeetCode Solution150
773k-th missing element in increasing sequence which is not present in a given sequence150
774Largest rectangular sub-matrix whose sum is 0149
775Maximum Difference Between Increasing Elements LeetCode Solution149
776Diagonal Traversal of Binary Tree149
777Kth ancestor of a node in binary tree149
778Morris Traversal149
779Evaluate Reverse Polish Notation LeetCode Solution149
780Growable array based stack149
781Merge K Sorted Linked Lists149
782Jump Game149
783Split a String in Balanced Strings Leetcode Solution149
784Elements to be added so that all elements of a range are present in array149
785Final Prices With a Special Discount in a Shop Leetcode Solution148
786Valid Number148
787Largest Rectangle in Histogram LeetCode Solution148
788Number Complement Leetcode Solution148
789Minimum number of jumps to reach end148
790Minimum Time Visiting All Points Leetcode Solution148
791Snakes and Ladders LeetCode Solution148
792Transpose Graph148
793Minimum time required to rot all oranges148
794Program for Bridge and Torch problem148
795Remove brackets from an algebraic string containing + and – operators148
796Crawler Log Folder Leetcode Solution147
797Sort an array according to the order defined by another array147
798Get Maximum in Generated Array Leetcode Solution147
799Number of NGEs to the Right147
800Tiling Problem147
801Remove Duplicates from Sorted List II147
802Regular Expression Matching147
803Nested List Weight Sum II LeetCode Solution147
804Special Array With X Elements Greater Than or Equal X Leetcode Solution147
805Nearest Exit from Entrance in Maze LeetCode Solution147
806Merge Sorted Array LeetCode Solution147
807Check for Palindrome after every character replacement Query147
808Count items common to both the lists but with different prices147
809Relative Ranks Leetcode Solution147
810Check if Two Expressions With Brackets are Same147
811Minimum Jumps to Reach Home LeetCode Solution147
812Minimum Number of Taps to Open to Water a Garden LeetCode Solution146
813Sort Colors146
814Circular Queue146
815Interval Tree146
816Sort Array By Parity II Leetcode Solution146
817Maximum size subarray sum equals k146
818Subarray Product Less Than K LeetCode Solution146
819String comparison containing wildcards146
820Longest Subarray Having Count of 1s One More than Count of 0s146
821Print a Binary Tree in Vertical Order146
822Reorder Data in Log Files LeetCode Solution146
823Convert BST to Min Heap146
824Base 7 Leetcode Solution146
825One Edit Distance LeetCode Solution146
826Friends Pairing Problem146
827A Space Optimized DP solution for 0-1 Knapsack Problem146
828Partition to K Equal Sum Subsets Leetcode Solution146
829Find the subarray with least average145
830Check if a given array can represent Preorder Traversal of Binary Search Tree145
831Maximum Profit in Job Scheduling Leetcode Solution145
832Alien Dictionary LeetCode Solution145
833Path with maximum average value145
834Priority Queue using doubly linked list145
835Subsequence of Size K With the Largest Even Sum LeetCode Solution145
836Minimum swaps to make sequences increasing145
837Sorted Array to Balanced BST145
838Clone Graph LeetCode Solution145
839Minimum Swaps to Make Strings Equal Leetcode Solution144
840Total Numbers With no Repeated Digits in a Range144
841Insert into a Binary Search Tree Leetcode Solution144
842Find the Only Repetitive Element Between 1 to N-1144
843Iterative Preorder Traversal144
844Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution144
845Last Stone Weight II LeetCode Solution144
846Course Schedule II – LeetCode144
847Count Distinct Elements in Every Window of Size K144
848Level order Traversal in Spiral Form144
849Design a Stack With Increment Operation Leetcode Solution144
850Partition List Leetcode Solution144
851Brightest Position on Street LeetCode Solution144
852Guess Number Higher or Lower LeetCode Solution144
853Check if an Array is Stack Sortable143
854Permutation Coefficient143
855Top K Frequent Words LeetCode Solution143
856Brick Wall LeetCode Solution143
857Subset with sum divisible by m143
858Union and Intersection of two Linked Lists143
859Can Place Flowers LeetCode Solution143
860Minimum Sum Path in a Triangle143
861Repeated Substring Pattern LeetCode Solution143
862Valid Parentheses Leetcode Solution143
863Three way partitioning of an array around a given range143
864Find all triplets with zero sum143
865Maximum Nesting Depth of the Parentheses Leetcode Solution143
866Lemonade Change Leetcode Solution142
867Water Bottles Leetcode Solution142
868Find All Possible Recipes from Given Supplies LeetCode Solution142
869Form Minimum Number From Given Sequence142
870Given an Array of Pairs Find all Symmetric Pairs in it142
871Check whether a given Binary Tree is Complete or not142
872Matrix Chain Multiplication141
873Design Browser History LeetCode Solution141
874Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution141
875Spiral Matrix II Leetcode Solution141
876Tree Traversal (Preorder, Inorder & Postorder)141
878Range sum queries without updates141
879Count ways to reach the nth stair using step 1, 2 or 3141
880Binary Search Tree Search and Insertion141
881Rearrange Spaces Between Words Leetcode Solution141
882LCS (Longest Common Subsequence) of three strings141
883Sum of nearest smaller and greater number141
884Identify and Mark Unmatched Parenthesis in an Expression141
885Balanced Expression with Replacement141
886GCDs of given index ranges in an array141
887Daily Temperatures Leetcode Solution141
888Least Number of Unique Integers after K Removals Leetcode Solution141
889Shortest Word Distance Leetcode Solution140
890Distinct adjacent elements in an array140
891Insert Delete GetRandom140
892Special Positions in a Binary Matrix Leetcode Solution140
893An Interesting Method to generate Binary Numbers from 1 to n140
894Construct Complete Binary Tree from its Linked List Representation140
895Sequences of given length where every element is more than or equal to twice of previous140
896Destination City Leetcode Solution140
897Queries for GCD of all numbers of an array except elements in a given range140
898Delete And Earn140
899Diagonal Traversal LeetCode Solution140
900Find Maximum Sum Possible Equal Sum of Three Stacks140
901Guess Number Higher or Lower II140
902Find all permuted rows of a given row in a matrix140
903Count Negative Numbers in a Sorted Matrix LeetCode Solution140
904Robot Bounded In Circle LeetCode Solution140
905BFS for Disconnected Graph140
906Missing Element in Sorted Array LeetCode Solution140
907Count Subarrays with Same Even and Odd Elements140
908Number of Days Between Two Dates LeetCode Solution140
909Maximum Score After Splitting a String Leetcode Solution140
910Minimum sum of multiplications of n numbers139
911Check if the given array can represent Level Order Traversal of Binary Search Tree139
912Alien Dictionary139
913A program to check if a binary tree is BST or not139
914Time Based Key-Value Store LeetCode Solution139
915Set Matrix Zeroes Leetcode Solution139
916Check if stack elements are pairwise consecutive139
917Convert Sorted List to Binary Search Tree139
918Rearrange an Array Such that arr[i] is equal to i139
919Palindrome Partitioning Leetcode Solution138
920Vertical sum in a given binary tree138
921Range LCM Queries138
922Number of Distinct Islands Leetcode Solution138
923Diagonal Traverse LeetCode Solution138
924Find Common Characters Leetcode Solution138
925Find distance between two nodes of a Binary Tree138
926Analyze User Website Visit Pattern LeetCode Solution138
927Merge Two Sorted Lists Leetcode137
928K’th Largest Element in BST when modification to BST is not allowed137
929Longest Palindromic Subsequence137
930Can Make Arithmetic Progression From Sequence Leetcode Solution137
931Stone Game II Leetcode137
932Merging Intervals137
933Remove Duplicates from Sorted List II LeetCode Solution137
934Spiral Matrix III LeetCode Solution137
9353 Sum137
936Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i137
937Maximum Subarray Sum Excluding Certain Elements136
938Maximum Frequency Stack Leetcode Solution136
939Maximize Sum of Array after K Negations Leetcode Solution136
940Infix to Postfix136
941Number of Equivalent Domino Pairs Leetcode Solution136
942Word Break136
943Queue using Stacks136
944Intersection of Two Linked Lists LeetCode Solution136
945Averages of Levels in Binary Tree136
946Sliding Window Maximum136
947Construct the Rectangle Leetcode Solution136
948Three Consecutive Odds Leetcode Solution136
949Lexicographical Numbers Leetcode Solution136
950Print Fibonacci sequence using 2 variables136
951Largest area rectangular sub-matrix with equal number of 1’s and 0’s136
952Strongly Connected Component136
953Count Submatrices With All Ones LeetCode Solution135
954Reverse Nodes in K-Group135
955Difference Array | Range update query in O(1)135
956Pattern Occurrences using Stack135
957Trim a Binary Search Tree135
958Breadth First Search (BFS) for a Graph135
959Binary Tree Longest Consecutive Sequence LeetCode Solution135
960Construct BST from its given Level Order Traversal135
961Binary array after M range toggle operations135
962Median of Two Sorted Arrays135
963Dividing Array into Pairs With Sum Divisible by K135
964All Unique Triplets that Sum up to a Given Value135
965Minimum Height Trees LeetCode Solution135
966Check if any two intervals overlap among a given set of intervals135
967Largest divisible pairs subset134
968Find Maximum of Minimum for Every Window Size in a Given Array134
969Height of a generic tree from parent array134
970Check If a Word Occurs As a Prefix of Any Word in a Sentence Leetcode Solution134
971Largest Substring Between Two Equal Characters Leetcode Solution134
972Palindrome Partitioning134
973Split Array Into Consecutive Subsequences134
974Count Primes in Ranges134
975Symmetric Tree134
976Find postorder traversal of BST from preorder traversal134
977Create Maximum Number134
978Newman-Conway Sequence134
979K Closest Points to Origin Leetcode Solution133
980Product of Array Except Self LeetCode Solution133
981Sign of the Product of an Array LeetCode Solution133
982Binary Search Tree Delete Operation133
983First missing positive133
984Find Duplicate Subtrees133
985Kth Smallest Element in a BST Leetcode Solution133
986Asteroid Collision LeetCode Solution133
987Iterative Postorder Traversal Using Two Stacks133
988Maximum Product Subarray133
989Count pair with Given Sum133
990Minesweeper LeetCode Solution133
991Depth First Search (DFS) for a Graph133
992Shuffle 2n integers as without using extra space133
993Segment Tree133
994Find the First Circular Tour that visits all the Petrol Pumps132
995The Maze III LeetCode Solution132
996Boundary Traversal of binary tree132
997Find the Difference Leetcode Solution132
998My Calendar I LeetCode Solution132
999The Painter’s Partition Problem132
1000Kill Process LeetCode Solution132
1001Level Order Traversal of Binary Tree132
1002Length of Longest Fibonacci Subsequence132
1003Climbing stairs132
1004Rearrange array such that even positioned are greater than odd132
1005Unique Paths II132
1006Serialize and Deserialize Binary Tree132
1007Maximum subsequence sum such that no three are consecutive132
1008Graph Valid Tree LeetCode Solution131
1009Partition Equal Subset Sum131
1010Next Greater Element III LeetCode Solution131
1011Maximum Number of Ways to Partition an Array LeetCode Solution131
1012Longest Nice Substring LeetCode Solution131
1013Decrypt String from Alphabet to Integer Mapping Leetcode Solution131
1014Build an Array With Stack Operations Leetcode Solution131
1015Count subarrays where second highest lie before highest131
1016Double the first element and move zero to end131
1017Longest subsequence such that difference between adjacents is one131
1018Make The String Great Leetcode Solution131
1019Super Ugly Number130
1020Shortest Completing Word Leetcode Solution130
1021Morris Inorder Traversal130
1022Insertion in a Binary Tree130
1023Maximum Length of Repeated Subarray130
1024Collect maximum points in a grid using two traversals130
1025Find number of pairs in an array such that their XOR is 0130
1026Largest Number Leetcode Solution130
1027Boolean Parenthesization Problem130
1028Level order traversal using two Queues130
1029Valid Boomerang Leetcode Solution130
1030String Matching in an Array Leetcode Solution129
1031Design Hit Counter LeetCode Solution129
1032Advantages of BST over Hash Table129
1033Ugly Number II LeetCode Solution129
1034Balanced Binary Tree129
1035Friends Of Appropriate Ages LeetCode Solution129
1036Number Of Longest Increasing Subsequence129
1037Compute nCr % p129
1038Recover Binary Search Tree Leetcode Solution129
1039Binary Search Tree129
1040Validate Binary Search Tree128
1041Kth Smallest Element in a Sorted Matrix LeetCode Solution128
1042Invalid Transactions LeetCode Solution128
1043Construction of Longest Increasing Subsequence (N log N)128
1044Employee Importance LeetCode Solution128
1045Number of palindromic paths in a matrix128
1046Implement Trie (Prefix Tree) Leetcode Solution128
1047Defanging an IP Address LeetCode Solution128
1048Available Captures for Rook Leetcode Solution128
1049Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’128
1050Maximum length subsequence with difference between adjacent elements as either 0 or 1128
1051Scramble String LeetCode Solution128
1052Ugly Numbers128
1053Move all negative elements to end in order with extra space allowed128
1054Minimum Size Subarray Sum128
1055Construct Binary Tree from given Parent Array representation128
1056Maximum Product of Indexes of Next Greater on Left and Right128
1057Maximum weight transformation of a given string127
1058Maximum difference between frequency of two elements such that element having greater frequency is also greater127
1059Count minimum steps to get the given desired array127
1060Longest Bitonic Subsequence127
1061Populating Next Right Pointers in Each Node Leetcode Solution127
1062Find Peak Element127
1063Add two numbers127
1064Regular Expression Matching Regular Expression Matching LeetCode Solution127
1065Increasing Triplet Subsequence LeetCode Solution127
1066Minimum Index Sum of Two Lists127
1067Find whether a subarray is in form of a mountain or not127
1068Maximum Sum of 3 Non-Overlapping Subarrays127
1069Iterative Depth First Traversal of Graph127
1070Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution126
1071Bitwise AND of Numbers Range LeetCode Solution126
1072Maximize Distance to Closest Person LeetCode Solution126
1073Find the minimum distance between two numbers126
1074Divisible Pairs Counting126
1075Generate Parentheses Leetcode Solution126
1076Count pairs from two sorted arrays whose sum is equal to a given value x126
1077Remove Duplicates from Sorted Array II Leetcode Solution126
1078Day of the Year Leetcode Solution126
1079Custom Sort String Leetcode Solution126
1080Lowest Common Ancestor126
1081Clone a Binary Tree with Random Pointers126
1082Path Sum II LeetCode Solution126
1083Find a Peak Element II LeetCode Solution126
1084Combination Sum IV LeetCode Solution126
1085Path Sum125
1086Binary Tree Data Structure125
1087Search in Sorted Rotated Array125
1088Number of Closed Islands Leetcode Solution125
1089Binary Tree Right Side View LeetCode Solution125
1090Largest BST Subtree LeetCode Solution125
1091Smallest Common Region Leetcode Solution125
1092Remove Palindromic Subsequences Leetcode Solution124
1093Consecutive Characters LeetCode Solution124
1094Find Smallest Range Containing Elements from k Lists124
1095Rearrange array such that even index elements are smaller and odd index elements are greater124
1096Subarrays with K Different Integers Leetcode Solution124
1097Kth Smallest Product of Two Sorted Arrays LeetCode Solution124
1098Level of Each node in a Tree from source node124
1099Find maximum difference between nearest left and right smaller elements124
1100Print Next Greater Number of Q queries124
1101Types of Binary Tree124
1102Next Permutation Leetcode Solution124
1103Print all triplets in sorted array that form AP124
1104Number of Students Doing Homework at a Given Time Leetcode Solution124
1105Number of siblings of a given Node in n-ary Tree124
1106Serialize and Deserialize Binary Tree LeetCode Solution123
1107Topological Sorting123
1108Distinct Subsequences123
1109Find Three Element From Different Three Arrays Such That a + b + c = sum123
1110Third Maximum Number Leetcode Solution123
1111Convert BST into a Min-Heap without using array122
1112Write Code to Determine if Two Trees are Identical122
1113Bottom View of a Binary Tree122
1114Maximum Binary Tree122
1115Constant time range add operation on an array122
1116Remove duplicates from sorted array122
1117Minimum Absolute Difference in BST Leetcode Solution122
1118Print Right View of a Binary Tree122
1119Cutting a Rod122
1120Maximum Product Subarray122
1121Root to Leaf path with target sum Leetcode Solutions122
1122Reformat The String Leetcode Solution121
1123Minimum Score Triangulation of Polygon Leetcode Solution121
1124Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution121
1125Cells with Odd Values in a Matrix LeetCode Solution121
1126Mean of Array After Removing Some Elements Leetcode Solution121
1127Valid Tic-Tac-Toe State LeetCode Solution121
1128Count Largest Group Leetcode Solution121
1129Closest Binary Search Tree Value Leetcode Solution120
1130Construct K Palindrome Strings LeetCode Solution120
1131Products of ranges in an array120
1132Search an Element in Sorted Rotated Array120
1133Longest Subarray of 1’s After Deleting One Element LeetCode Solution120
1134Search Insert Position120
1135Minimum sum of squares of character counts in a given string after removing k characters120
1136Palindrome Permutation LeetCode Solution120
1137Thousand Separator Leetcode Solution120
1138Iterative method to find ancestors of a given binary tree120
1139Golomb sequence120
1140Sum of Even Numbers After Queries120
1141Queries for Number of Distinct Elements in a Subarray120
1142Moser-de Bruijn Sequence119
1143Print modified array after executing the commands of addition and subtraction119
1144Longest Increasing Consecutive Subsequence119
1145Find a sorted subsequence of size 3 in linear time119
1146Red-Black Tree Introduction119
1147Prime Palindrome LeetCode Solution119
1148Factorial Trailing Zeroes LeetCode Solution119
1149Merge two BSTs with limited extra space118
1150Maximum Product of Splitted Binary Tree LeetCode Solution118
1151Find maximum length Snake sequence118
1152Bus Routes Leetcode Solution118
1153Subset Sum Problem in O(sum) space118
1154Delete Nodes and Return Forest Leetcode Solution118
1155Binary Tree to Binary Search Tree Conversion118
1156Transform a BST to Greater sum Tree118
1157Swapping Nodes in a Linked List Leetcode Solution117
1158Count even length binary sequences with same sum of first and second half bits117
1159Decision Tree117
1160K maximum sums of overlapping contiguous sub-arrays117
1161Number of Orders in the Backlog Leetcode Solution117
1162Possible Bipartition LeetCode Solution117
1163Check Array Formation Through Concatenation Leetcode Solution117
1164Kth Smallest Number in Multiplication Table Leetcode Solution117
1165K’th Largest element in BST using constant extra space117
1166Swap Nodes In Pairs117
1167Find the smallest binary digit multiple of given number117
1168Palindromic Substrings Leetcode Solution117
1169Longest Repeated Subsequence117
1170Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution117
1171Compare Strings by Frequency of the Smallest Character Leetcode Solution117
1172Maximize sum of consecutive differences in a circular array116
1173Minimum Sideway Jumps LeetCode Solution116
1174Rotate Array116
1175Minimum Cost to Move Chips to The Same Position LeetCode Solution116
1176Priority Queue116
1177Minimum Moves to Equal Array Elements LeetCode Solution116
1178Web Crawler LeetCode Solution116
1179Find Largest Value in Each Tree Row LeetCode Solution115
1180Search Suggestions System LeetCode Solution115
1181Decrease Elements To Make Array Zigzag LeetCode Solution115
1182First Bad Version115
1183Closest Leaf in a Binary Tree LeetCode Solution115
1184Count Pairs Whose Products Exist in Array115
1185Moving Stones Until Consecutive Leetcode Solution114
1186Diameter of N-Ary Tree LeetCode Solution114
1187Remove Max Number of Edges to Keep Graph Fully Traversable Leetcode Solution114
1188Queue Reconstruction by Height114
1189Contiguous Array LeetCode Solution114
1190Given a binary tree, how do you remove all the half nodes?114
1191Maximum sum bitonic subarray113
1192Lowest Common Ancestor in Binary Search Tree113
1193Kth Smallest Element in a BST113
1194Convert Sorted Array to Binary Search Tree LeetCode Solutions113
1195Valid Triangle Number113
1196How to print maximum number of A’s using given four keys113
1197Maximum number of segments of lengths a, b and c113
1198Reverse a Path in BST using Queue113
1199Maximum Depth Of Binary Tree113
1200Matchsticks to Square Leetcode Solution113
1201Divide Two Integers Leetcode Solution112
1202Sum of Left Leaves LeetCode Solution112
1203Longest Common Prefix Using Word by Word Matching112
1204Reformat Date LeetCode Solution112
1205Champagne Tower LeetCode Solution112
1206Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution112
1207Write a function to get the intersection point of two Linked Lists112
1208Integer Break LeetCode Solution112
1209Array Queries for multiply replacements and product112
1210Guess The Word111
1211Range Queries for Longest Correct Bracket Subsequence111
1212Range Sum Query using Sparse Table111
1213New 21 Game111
1214Maximum sum of pairs with specific difference111
1215Replace two consecutive equal values with one greater111
1216Path Crossing Leetcode Solution110
1217Arithmetic Slices II – Subsequence LeetCode Solution110
1218Design Skiplist LeetCode Solution110
1219Concatenation of Array LeetCode Solution110
1220Valid Perfect Square LeetCode Solution110
1221Maximum Value at a Given Index in a Bounded Array LeetCode Solution110
1222Convert Integer to the Sum of Two No-Zero Integers Leetcode Solution110
1223Graph and its representation110
1224Symmetric Tree LeetCode Solution Leetcode Solution110
1225Print modified array after multiple array range increment operations110
1226The kth Factor of n Leetcode Solution109
1227Sliding Window Median Leetcode Solution109
1228Merge Sort109
1229Minimum Swaps To Make Sequences Increasing LeetCode Solution109
1230Perfect Squares LeetCode Solution109
1231Lowest Common Ancestor of a Binary Tree Leetcode Solution109
1232Maximum sum of a path in a Right Number Triangle109
1233BST to a Tree with Sum of all Smaller Keys109
1234Check Completeness of a Binary Tree LeetCode Solution109
1235Check if each internal node of a BST has exactly one child109
1236Maximum Array from Two given Arrays Keeping Order Same109
1237Flatten 2D Vector LeetCode Solution109
1238Check for Identical BSTs without building the trees109
1239Check if all levels of two Binary Tree are anagrams or not108
1240Parallel Courses II LeetCode Solution108
1241Count Subsets Having Distinct Even Numbers108
1242Mean of range in array108
1243LRU Cache Leetcode Solution108
1244Queries on Probability of Even or Odd Number in given Ranges108
1245Print n terms of Newman-Conway Sequence108
1246Power of Two108
1247Maximum Product Subarray107
1248Find Minimum in Rotated Sorted Array II LeetCode Solution107
1249Maximize Elements Using Another Array107
1250Missing Number107
1251Contiguous Array107
1252Image Overlap LeetCode Solution107
1253Count and Toggle Queries on a Binary Array107
1254Largest Plus Sign Leetcode Solution107
1255Graph Cloning107
1256Find minimum number of merge operations to make an array palindrome106
1257Check If a String Can Break Another String Leetcode Solution106
1258Bold Words in String LeetCode Solution106
1259Next greater element105
1260Excel Sheet Column Title LeetCode Solution105
1261Minimum Remove to Make Valid Parentheses LeetCode Solution105
1262Find k-th smallest element in BST (Order Statistics in BST)105
1263Verify Preorder Serialization of a Binary Tree105
1264Merge k Sorted Lists Leetcode Solution104
1265Print Ancestors of a Given Binary Tree Node Without Recursion104
1266Min Cost Climbing Stairs LeetCode Solution104
1267Smallest Range II Leetcode Solution104
1268Minimum Time to Collect All Apples in a Tree LeetCode Solution103
1269Palindrome Partitioning103
1270Check if two nodes are on the same path in a Tree102
1271Check in binary array the number represented by a subarray is odd or even102
1272Merge Sorted Array101
1273Orderly Queue LeetCode Solution101
1274Koko Eating Bananas LeetCode Solution100
1275Different Ways to Add Parentheses Leetcode Solution100
1276Peeking Iterator LeetCode Solution100
1277Newman–Shanks–Williams prime99
1278Check if X can give change to every person in the Queue99
1279Number of elements less than or equal to a given number in a given subarray99
1280Longest Substring Without Repeating Characters Leetcode Solution98
1281Find maximum average subarray of k length97
1282Maximum Sum Increasing Subsequence97
1283Range Minimum Query (Square Root Decomposition and Sparse Table)97
1284Largest Submatrix With Rearrangements LeetCode Solution97
1285Queries for Decimal Values of Subarrays of a Binary Array96
1286Array Nesting Leetcode Solution96
1287Minimum Total Space Wasted With K Resizing Operations LeetCode Solution96
1288Number of indexes with equal elements in given range96
1289Minimum Number of People to Teach LeetCode Solution95
1290Maximum product of an increasing subsequence95
1291Binary Tree to Binary Search Tree Conversion using STL set94
1292Check given array of size n can represent BST of n levels or not94
1293Arranging Coins Leetcode Solution94
1294Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution93
1295Random Pick Index LeetCode Solution93
1296Find the Winner of the Circular Game LeetCode Solution92
1297Add Two Numbers II Leetcode Solution92
1298Jump Game IV LeetCode Solution92
1299Encoded String With Shortest Length LeetCode Solution92
1300Queries on XOR of greatest odd divisor of the range92
1301Convert a BST to a Binary Tree such that sum of all greater keys is added to every key92
1302Convert to Base -2 LeetCode Solution92
1303Reach a Number LeetCode Solution92
1304Insert Delete GetRandom O(1) Leetcode Solution90
1305Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution89
1306Palindrome Number LeetCode Solution88
1307Vertical Order Traversal of Binary Tree LeetCode Solution87
1308Continuous Subarray Sum LeetCode Solution87
1309Design Underground System Leetcode Solution86
1310Print Maximum Length Chain of Pairs85
1311Detect Capital Leetcode Solution82
1312Design A Leaderboard Leetcode Solution81
1313Top K Frequent Elements LeetCode Solution79
1314Substring with Concatenation of All Words Leetcode Solution79
1315Minimum Swaps to Group All 1’s Together Leetcode Solution78
1316Minimum Path Sum Leetcode Solution75
1317Decode String Leetcode Solution74
1318Count Sub Islands LeetCode Solution73
1319Odd Even Linked List Leetcode Solution72
1320Binary Tree Inorder Traversal LeetCode Solution72
1321Maximum Population Year LeetCode Solution71
1322Shifting Letters LeetCode Solution71
1323Shortest Unsorted Continuous Subarray LeetCode Solution71
1324Best Meeting Point LeetCode Solution71
1325Find the Town Judge LeetCode Solution70
1326Longest Common Subsequence LeetCode Solution70
1327Sum Root to Leaf Numbers LeetCode Solution70
1328Design Add and Search Words Data Structure LeetCode Solution68
1329Find the Town Judge LeetCode Solution68
1330Rectangle Overlap LeetCode Solution66
1331Maximum Population Year LeetCode Solution66
1332Score of Parenthesis LeetCode Solution65
1333Insert into a Sorted Circular Linked List LeetCode Solution63
1334Stone Game IV LeetCode Solution62
1335Flatten Binary Tree to Linked List LeetCode Solution62
1336Is Graph Bipartite? LeetCode Solution60
1337Range Sum Query 2D – Immutable LeetCode Solution60
1338Valid Triangle Number LeetCode Solution59
1339Reveal Cards In Increasing Order Leetcode Solution55
1340Divide Chocolate LeetCode Solution51
1341Range Sum of BST LeetCode Solution43
1342Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution42
1343Reverse Integer Leetcode Solution41
1344Sort Colors LeetCode Solution37
1345Find K Closest Elements LeetCode Solution36
1346Excel Sheet Column Number LeetCode Solution34
1347Rotate String LeetCode Solution32
1348Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution31
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