## Maximum Subarray Leetcode Solution

Problem Statement Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. Example nums = [-2,1,-3,4,-1,2,1,-5,4] 6 Explanation: [4,-1,2,1] has the largest sum = 6. nums = [-1] -1 Approach 1 (Divide and Conquer) In this approach …

## Majority Element Leetcode Solution

Problem Statement We are given an array of integers. We need to return the integer which occurs more than ⌊N / 2⌋ time in the array where ⌊ ⌋ is the floor operator. This element is called the majority element. Note that the input array always contains a majority element. …

## Kth largest element in an Array Leetcode Solutions

In this problem, we have to return the kth largest element in an unsorted array. Note that the array can have duplicates. So, we have to find the Kth largest element in the sorted order, not the distinct Kth largest element. Example A = {4 , 2 , 5 , 3 …

## Scramble String

Problem Statement “Scramble String” problem states that you are given two strings. Check if the second string is a scrambled string of first one or not? Explanation Let string s = “great” Representation of s as binary tree by recursively dividing it into two non-empty sub-strings. This string can be …

## Sequences of given length where every element is more than or equal to twice of previous

The problem “Sequences of given length where every element is more than or equal to twice of previous” provides us with two integers m and n. Here m is the largest number that can exist in the sequence and n is the number of elements that must be present in the …

## Shuffle 2n integers as a1-b1-a2-b2-a3-b3-..bn without using extra space

Problem Statement You are given an array of integers. The problem “Shuffle 2n integers as a1-b1-a2-b2-a3-b3-..bn without using extra space” asks to shuffle all the numbers in the array such that the numbers which are like (x0, x1, x2, x3, y0, y1, y2, y3) will be shuffled like x0, y0, …

## Find Minimum In Rotated Sorted Array

Problem Statement “Find Minimum In Rotated Sorted Array” states that you are given a sorted array of size n which is rotated at some index. Find the minimum element in the array. Example a[ ] = {5, 1, 2, 3, 4} 1 Explanation: If we arrange the array in sorted …

## The Painter’s Partition Problem

Problem Statement The Painter’s Partition problem states that we have some fences and we have some painters. We want to minimize the time of painting all the fences by painters. There is a bound on the order of painting the fences by painters. Consider we have n painters, then painter …

## K-th Distinct Element in an Array

You are given an integer array A, print k-th distinct element in an array. The given array may contain duplicates and the output should print k-th distinct element among all unique elements in an array. If k is more than a number of distinct elements, then report it. Example Input: …

## Median of Two Sorted Arrays

Given two sorted arrays A and B of size n and m respectively. Find the median of the final sorted array obtained after merging the given two arrays or in other words, we say that find median of two sorted arrays. ( Expected time complexity: O(log(n)) ) Approach 1 for …