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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

Posted by jiandanxiaowan at 2011-03-17 23:57:55 on Problem 2531
In Reply To: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
为什么是2^20,复杂度O(20*2^20)   ???    不胜感激!~

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