Word Search - Given an m x n grid of characters board and a string word, return true if word exists in the grid. The word can be constructed from letters of sequentially adjacent cells, …

Word Search II - Given an m x n board of characters and a list of strings words, return all words on the board. Each word must be constructed from letters of sequentially adjacent cells, where …

Design Add and Search Words Data Structure - Design a data structure that supports adding new words and finding if a string matches any previously added string.

Can you solve this real interview question? Maximum XOR With an Element From Array - You are given an array nums consisting of non-negative integers. You are also given a queries array, …