文件名称:N-queen-problem
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在N*N的方格棋盘放置了N个皇后，使得它们不相互攻击（即任意2个皇后不允许处在同一排，同一列，也不允许处在与棋盘边框成45角的斜线上。
你的任务是，对于给定的N，求出有多少种合法的放置方法。
-In N* N checkerboard of placed N a queen, so they don t attack each other (that is, any two queen not allowed in the same row, the same listed, and not allowed to board a border in 45 Angle on the diagonal lines.
Your task is for a given N, find out how many kinds of legal placed method.
你的任务是，对于给定的N，求出有多少种合法的放置方法。
-In N* N checkerboard of placed N a queen, so they don t attack each other (that is, any two queen not allowed in the same row, the same listed, and not allowed to board a border in 45 Angle on the diagonal lines.
Your task is for a given N, find out how many kinds of legal placed method.
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N queen problem.CPP