摘要：
On a 0-indexed 8 x 8 chessboard, there can be multiple black queens ad one white king. You are given a 2D integer array queens where queens[i] = [xQue 阅读全文
摘要：
There is a knight on an n x n chessboard. In a valid configuration, the knight starts at the top-left cell of the board and visits every cell on the b 阅读全文