做个实验
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ll __int128_t
#define ar array<int, 2>
#define arr array<int, 3>
int n, m, k, inf = 1LL << 61, mod = 998244353;// 1e9+7;
const int N = 5e5 + 50;
void solve() {
};
signed main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout << fixed << setprecision(15);
#ifdef DEBUG
freopen("../1.in", "r", stdin);
#endif
//init_f();
//init();
//expr();
// int T; cin >> T; while(T--)
solve();
return 0;
}