#include <bits/stdc++.h>
using namespace std ;
#define int long long
const int N = 2e5+10 ;
const int mod= 1e9+7 ;

void solve () {
int n ;cin>>n ;
cout <<0 <<"\n" ;
    
  
}
signed main () {
	// int t;
    // cin>>t ;
	//while (t--)
     {
        solve () ;
     }
}