学海无涯

摘要： The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other. Given an integer n, return all distinct solutions to the n-queens puzzle. Each solution contains a distinct board configuration of the n-queens' placement, where 'Q' and '.' both indicate a queen and an empty space respectively. 阅读全文

摘要： Implement pow(x, n). 阅读全文

摘要： Given an array of strings, group anagrams together. 阅读全文