#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define endl '\n'
#define sq(a) (a) * (a)
#define append push_back
const ll mod = 1e9 + 7;

int main() {
    ios::sync_with_stdio(0); cin.tie(0), cout.tie(0);
    #define file "uni"
    freopen(file".inp", "r", stdin); freopen(file".out", "w", stdout);



    return 0;
}