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

#define ll long long
#define endl '\n'
#define pi 2*acos(0.0)



void solve() 
{

    int n; cin >> n;
    cout << 0 << endl;



}

int main () 
{

    ios::sync_with_stdio(false); cin.tie(nullptr);
    

    ll t = 1; 
    //cin >> t;
    while(t--) {
        solve();
    }

    return 0;


}