Problem 🤔 Palindrome Definition a word, phrase, or sequence that reads the same backward as…

Problem 🤔 We're writing a string compression algorithm! Implement a method to perform basic…

Problem 🤔 Assume you have a method isSubstring which checks if one word is a substring of another…

Problem 🤔 Given a string with spaces, return the string, replacing each space with %20 . Our input…

Problem 🤔 We have a list of points on the plane. Find the K closest points to the origin (0,…

Problem 🤔 There are a total of n courses you have to take labelled from 0,...,n - 1 . Some courses…