Tag: hash set
Teaching Kids Programming: Videos on Data Structures and Algorithms Given an array of strings words, return the words that can be typed using letters of the alphabet on only …
Teaching Kids Programming: Videos on Data Structures and Algorithms Given a lowercase alphabet string s, return the index of the first recurring character in it. If there are no …
Teaching Kids Programming: Videos on Data Structures and Algorithms Given an integer array nums sorted in non-decreasing order, remove the duplicates in-place such that each unique element appears only …
Teaching Kids Programming: Videos on Data Structures and Algorithms Every valid email consists of a local name and a domain name, separated by the ‘@’ sign. Besides lowercase letters, …
Teaching Kids Programming: Videos on Data Structures and Algorithms Given an m x n integer matrix matrix, if an element is 0, set its entire row and column to …