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upup，偶也想知道，呵呵^_^

Posted by seol at 2005-03-13 21:17:38 on Problem 1766
In Reply To:0.5K过的那些大牛，能讲讲方法吗 Posted by:atlas_of_rruucc at 2005-03-13 20:46:25 
估计有公式，不过我图论很差，用欧拉公式推了一个下午都没有推出来：）
> 我的方法很繁，2K+才能过
> 可以用到欧拉公式吗
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