The goal of this problem is to swap nodes of a given linked list in pairs, that is, swapping every two adjacent nodes. If we are allowed to swap just the value of the list nodes, the problem would be trivial. So, we are not allowed to modify the node …
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 …
Suppose you have an integer array. The problem statement asks to rearrange the array in such a way that the elements at even position in an array should be greater than all elements before it and the elements at odd positions should be less than the elements before it. Example …
Problem Statement Let a number x containing n digits. If sum of each digit raised to power n is equal to the number itself, then the number is said to be armstrong number i.e. abc… = pow(a, n) + pow(b, n) + pow(c, n) + …… Write a program to …
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 …
Given an array consisting of number 0’s and 1’s only. We have to find the length of the longest contiguous sub-array consisting o’s and 1’s equally. Example Input arr = [0,1,0,1,0,0,1] Output 6 Explanation The longest contiguous sub-array is marked in red [0,1,0,1,0,0,1] and its length is 6. Algorithm Set …
In problem “Convex Hull Algorithm” we have given a set of some points. The smallest polygon that can be formed with those points which contain all other points inside it will be called its convex hull. This can be achieved by using Jarvis Algorithm. Algorithm Initialize a leftmost point to …
We have to find out the group anagrams of the given words. This means for each word we are going to sort it and store it as a key and original input which is not sorted as a value and if any other input has the same value as a …
Suppose a man standing in the first cell or the top left corner of “a × b” matrix. A man can move only either up or down. That person wants to reach his destination and that destination for him is the last cell of the matrix or bottom right corner. …
In problem “Maximum Length of Repeated Subarray” we have given two arrays Array 1 and Array 2, your task is to find the maximum length of the sub-array that appears in both the arrays. Example Input: [1,2,3,2,1] [3,2,1,4,7] Output: 3 Explanation: Because the maximum length of sub-array is 3 and …