Category: Hash Map / Hash Set

Teaching Kids Programming: Videos on Data Structures and Algorithms Given an array of integers arr and an integer k. Find the least number of unique integers after removing exactly …

Teaching Kids Programming: Videos on Data Structures and Algorithms You are given an integer array nums with the following properties: nums.length == 2 * n. nums contains n + …

Teaching Kids Programming: Videos on Data Structures and Algorithms Given a string s, return the length of the longest substring between two equal characters, excluding the two characters. If …

Teaching Kids Programming: Videos on Data Structures and Algorithms You are given an array nums of positive integers and an integer k. In one operation, you can remove the …

Teaching Kids Programming: Videos on Data Structures and Algorithms You are given a string moves of length n consisting only of characters ‘L’, ‘R’, and ‘_’. The string represents …