原文:[leetcode]N-Queens @ Python

原題地址:https: oj.leetcode.com problems n queens 題意:經典的N皇后問題。 解題思路:這類型問題統稱為遞歸回溯問題,也可以叫做對決策樹的深度優先搜索 dfs 。N皇后問題有個技巧的關鍵在於棋盤的表示方法,這里使用一個數組就可以表達了。比如board , , , ,這是 皇后問題的一個解,意思是:在第 行,皇后放在第 列 在第 行,皇后放在第 列 在第 行, ...

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