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先把所有是J的方格按X坐标从小到大排序(X坐标相同按Y排),然后枚举的时候可以加一个无最优解剪枝In Reply To:行行好吧，我机子上数据都在一秒以内都出来了..为什么PKU不升级电脑呢？ Posted by:WangDong at 2007-07-10 11:56:53 Followed by:
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