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Feeling anxious, huh? This is normal. Your body tells you that you're going to do something that matters. Twenty-four hours before your site, it's ab…

passionateprogrammers.com

Given the head of a linked list, return the list after sorting it in ascending order. Follow up: Can you sort the linked list in O(n logn) time and O(…

blog.gowthy.com

Given an array of integers nums and an integer k, return the total number of continuous subarrays whose sum equals k. Example 1: Input: nums = [1,1,1]…

Given the root of a binary tree, return the postorder traversal of its nodes' values. Example 1: Input: root = [1,null,2,3] Output: [3,2,1] Example 2:…

Given k sorted arrays of size n each, merge them and print the sorted output. Example: Input: k = 3, n = 4 arr[][] = { {1, 3, 5, 7}, {2, 4, 6, 8},…