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杯具了一晚上

Posted by __24__ at 2010-08-11 09:21:11 on Problem 3013
因为那个inf照平常的习惯设置为1000000000,但是这个的结果会超出int64,  首先一直想不明白为什么WA,还拿了随机数据无限测试,无限正确, 后来突然想起这个问题, 但此时我以快“泪流满面”!!!!!!!!!!
对了,那个所谓的读入优化是什么?

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