code：

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

int main()
{
    int a;
    double avg, maxn = 0, minn = 1e7, ans;
    cin >> a;
    for (int i = 1; i <= a; i++)
    {
        double x;
        cin >> x;
        avg += x;
        maxn = max(maxn, x);
        minn = min(minn, x);
    }
    avg /= a;
    ans = max(maxn - avg, avg - minn);
    cout << fixed << setprecision(2) << avg << endl << fixed << setprecision(2) << ans;
    return 0;
}