Array 4

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int main()
{
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif

    int n;
    cin >> n;
    int arr[n];
    int sum=0;
    for(int i=0;i<n;i++)
        cin >> arr[i];
    for(int i=0;i<n;i++)
        sum+=arr[i];
    double avg = (sum*1.0)/(n*1.0);
    cout << avg << endl;

    return 0;
}