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

double a[2147483];
int main() {
	int n;
	long double xm = 0;
	cin >> n;
	for(int i = 1; i <= n; i++) cin >> a[i];
	xm = n * 100;
	for(int i = 1; i <= n; i++) xm += a[i];
	cout << xm;
	return 0;
}