#include <iostream>
#include <iomanip>
#include <string>
#include <algorithm>
#include <cmath>

using namespace std;

void sherry()
{
    ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
#endif
}

int main()
{
    sherry();
    int x, y;

    return 0;
}