#include <iostream>
using namespace std;
typedef long long int in;

int main() {
	ios_base::sync_with_stdio(false);
	in N;
	cin >> N;
	in m = 0;
	in a;
	// dein Code ...
	for(in n=0;n<N;n++) {
		cin >> a;
	}
	cout << m << endl;
}