#include <bits/stdc++.h>
using namespace std;
int main(){
    double n,sum = 0,num;
    double j;
    cin >> n;
    for(int i = 0;i < n;i++){
        cin >> num;
        sum += num;
    }
    sum = sum - n;
    j = sum / n * 1.0;
    cout << sum << " ";
    cout << fixed << setprecision(5) << j;
    return 0;
}