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题目有毒，非要用int溢出才过

Posted by Codefresher at 2017-07-01 10:02:29 on Problem 3233 
用long long还写了个防止溢出的乘法取模，WA好几发，然后发现题解都用int，但你会神奇的发现数据一大答案矩阵里基本都是负数，但是就是这样居然过了……
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