HDU 3074 (线段树+模P乘法)】的更多相关文章

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=3074 题目大意:单点更新.维护序列乘法.mod 1000000007. 解题思路: 1000000007*1000000007~10^18<9*10^18(int64) 所以单步模P乘法可以直接计算. (a*b)%p=[(a%p)*(b%p)]%p,PushUp维护即可. Query的rson的时候,要先判下lson是否存在,不存在ret=Query(rson),否则ret=(Query(lson…
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