Tag: stack data structure

Given a Unix path, represented as a list of strings, return its resolved version. In Unix, “..” means to go to the previous directory and “.” means to stay …

Teaching Kids Programming: Videos on Data Structures and Algorithms Given a string S of lowercase letters, a duplicate removal consists of choosing two adjacent and equal letters, and removing them. …

Given two strings S and T, return if they are equal when both are typed into empty text editors. # means a backspace character. Example 1: Input: S = …

Given a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST is changed to the original key plus sum of …