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

int main() {
	int a;
	cin >> a;
	int b = 0, c;
	for (int i = 1; i <= a; i++) {
		cin >> c;
		b += c;
	}
	double n;
	if (b <= 100)
		b = n;
	else
		n = 100 + (b - 100) * 0.9;
	cout << fixed << setprecision(2) << n;
	return 0;
}