Codeforces644div3Codeforces #644 div3
Codeforces #644 div3听说是div4改成的div3,然而我还是没有ak…A题目链接思路:规律题ACcodes:#include <bits/stdc++.h>using namespace std;const int N = 2e5+10;int test = 1;int n;int a,b;int main(){ scanf("%d",&test); while(test--) { cin >&a