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

int main() {
	int n,i,cur;
	cin >> n;
	vector<int> a(n-1);
	cur=0;
	for(i=0; i<n-1; i++){
		cin >> a[i];
		cur+=a[i];
	}
	cout << (cur+100)/n - cur/n << endl;
	return 0;
}