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Re:知道怎么做就告诉我吧,以及做法的正确性怎么证明,谢谢

Posted by vxk at 2003-11-13 18:23:43 on Problem 1507
In Reply To:知道怎么做就告诉我吧,以及做法的正确性怎么证明,谢谢 Posted by:hawk at 2003-11-13 18:12:07
云~~,4天以前的东西了/.///
仔细想一下吧.
我刚开始用的是穷举+部分剪枝(理论上完全可以做出来。)::Time。。。
Time...
后来该用一个数学公式(具体记不清了)
WA..
后来朋友改写了一部分(他的方法比我的好?),提交居然成功了..





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