Teaching Kids Programming: Videos on Data Structures and Algorithms Trie (we pronounce “try”) or prefix tree is a tree data structure used to retrieve a key in a strings …
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 an array nums of distinct integers, return all the possible permutations. You can return the answer in any order. …
Given a list of integers nums and an integer k, return the maximum values of each sublist of length k. Constraints 1 ≤ n ≤ 100,000 where n is …
You are given a binary tree root representing a game state of a two person game. Every internal node is filled with an empty value of 0 while the …
Teaching Kids Programming: Videos on Data Structures and Algorithms Given a string, your task is to count how many palindromic substrings in this string. The substrings with different start …