ｎ个皇后问题

在 n 行 n 列的国际象棋棋盘上，最多可布n个皇后。若两个皇后位于同一行、同一列、同一对角线上，则称为它们为互相攻击。

n皇后问题是指找到这 n 个皇后的互不攻击的布局。-n-Queens problem in n rows n columns of the chess board, up to n-Queens cloth. If the two Queens in the same row, same column, the same diagonal, then called them to attack each other. n queens problem is to find the n-queen not attack the layout of each other.