Suppose Andy and Doris want to choose a restaurant for dinner, and they both have a list of favorite…

You are given a string representing an attendance record for a student. The record only contains the…

Given a string s and a non-empty string p, find all the start indices of p‘s anagrams in s. St…

Count the number of segments in a string, where a segment is defined to be a contiguous sequence of …

Write a program that outputs the string representation of numbers from 1 to n. But for multiples of …

Given a string which consists of lowercase or uppercase letters, find the length of the longest pali…

Given a non-empty string s and an abbreviation abbr, return whether the string matches with the give…

Given two strings s and t which consist of only lowercase letters. String t is generated by random s…

Given an arbitrary ransom note string and another string containing letters from all the magazines, …