#include<iostream>
using namespace std;
int main() {
	int n;
	double s = 0;
	cout << "n = ";
	cin >> n;
	for (int i=0; i<n; i++) {
		double x;
		cout << "Number" << i+1 << " = ";
		cin >> x;
		s += x;
	}
	double m = s / n;
	cout << "Mean = " << m;
	return 0;
}