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不明白有什么地方需要剪枝。2^20=1000000，直接暴力DFS，复杂度O(20*2^20)，334ms

Posted by bmaster at 2011-03-16 18:40:06 on Problem 2531

Followed by:

Re:不明白有什么地方需要剪枝。2^20=1000000，直接暴力DFS，复杂度O(20*2^20)，334ms (38) jiandanxiaowan 2011-03-17 23:57:55
Re:不明白有什么地方需要剪枝。2^20=1000000，直接暴力DFS，复杂度O(20*2^20)，334ms (5) liuyu523115237 2011-04-15 20:01:56

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