In this problem, we are given two numbers a and b. Our task is to find Last Digit of a^b for Large Numbers. Let’s take an example to understand the problem,  Input: a = 4 b = 124Output: 6Explanation: The value of a^b is 4.523128486 * 1074Solution ApproachThe solution to the problem is based ... Read More

In this problem, we are given an integer n. Our task is to find the largest sum of digits in all divisors of n. Problem  Description: Here, we will find the divisor of the number n whose sum of digits in largest.Let’s take an example to understand the problem,  Input: 18Output: 9Explanation: All divisors of ... Read More

In this problem, we are given a binary tree. Our task is to find the largest subtree sum in a tree. Problem Description: The  binary tree consists of positive as well as negative values. And we need to find the subtree that has the maximum sum of nodes.Let’s take an example to ... Read More

In this problem, we are given a string N that represents a number. Our task is to find the largest number smaller than N with the same set of digits.  Problem Description: we need to find a number using all the digits of the given number which is the largest smaller number ... Read More

In this problem, we are given two numbers x and y. Our task is to find larger of x^y and y^x. Problem Description: The problem is simple, we need to find weather x to the power y is greater than y to the power x.Let’s take an example to understand the problem, ... Read More

In this problem, we are given n ranges and an integer k. Our task is to find k-th smallest element in given n ranges. We need to find the kth smallest elements from the array which is created after combining the ranges.Let’s take an example to understand the problem,  Input: ranges = ... Read More

In this problem, we are given a linked-list and a number k. Our task is to find kth node from Middle towards the Head of a Linked List. Let’s take an example to understand the problem,  Input: linked-list : 4 -> 2 -> 7 -> 1 -> 9 -> 12 -> 8 ... Read More

In this problem, we are given two integer values n and k. Our task is to find kth smallest number in range [1, n] when all the odd numbers are deleted. We need to find the kth smallest number in the range [1, n] which contains only even values.So, from range ... Read More

In this problem, we are given an array arr[] of n elements. Our task is to find k maximum elements of the array in original order. We need to find k maximum elements of the array and then print then as they were indexed originally.Let’s take an example to understand the ... Read More

In this problem, we are given an array arr[] of n integers.Our task is to find integers that divides maximum number of elements of the array. Problem Description: We need to find a number p which can divide the maximum number of elements of the array. In case, there are more than one ... Read More