T1 循环节 #include <bits/stdc++.h> using namespace std; const long long MOD = 1e18; const int N = 1e6; int rec[N], idx = 1; unordered_map<int, int> mp; int main() { int a, b; cin >> a >> b; long long ret = a; mp[a % 10] ++ ; rec[0] = a % 10; rec[idx] = a % 10; for(int i = 2; i &...