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There is a robot starting at the position (0, 0), the origin, on a 2D plane. Given a sequence of its moves, judge if this robot ends up at (0, 0)...
You are given an array of strings words and a string chars. A string is good if it can be formed by characters from chars (each character can only be...
A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the...
You are given a string s of even length. Split this string into two halves of equal lengths, and let a be the first half and b be the second half. Two...
Problem Link: https://leetcode.com/problems/reverse-prefix-of-word/description/ Given a 0-indexed string word and a character ch, reverse the segment...
The longest common prefix is a problem in that we can find the prefix in every string of the array. str = [ "flower", "flow", "flight" ] output: fl...
