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要用long long.....

Posted by 110c at 2010-10-25 21:25:10 on Problem 2417
因为题目给的数据是2^31,还以为用int就够了呢,结果WA了10+次,中间乘的时候有强制类型转换,快崩溃了,就试了下把所有的转换成long long就AC了,无限悲剧啊

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