#include <bits/stdc++.h>
using namespace std;
#define ll long long

void FastIO()
{
    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()
{
    FastIO();
    // Your code starts here...
}