Codeforces 750 E New Year and Old Subsequence-CSDN博客

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E. New Year and Old Subsequence思路：线段树维护矩阵乘法。代码：#pragma GCC optimize(2)#pragma GCC optimize(3)#pragma GCC optimize(4)#include<bits/stdc++.h>using namespace std;#define y1 y11#define...

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