#include <bits/stdc++.h>
using namespace std;
int n, i;
long long s, p = 1;
double ma, x;
int main()
{
cin >> n;
for(i = 1; i <= n; i ++)
{
cin >> x;
s = s + x;
p = p * x;
}
ma = s / (double)n;
cout << s - p << "\n";
cout << fixed << setprecision(2) << ma;
return 0;
}