参考答案：

#include<iostream>

using namespace std;

int main()
{
    double a, b, c, d, e;
    cin >> a >> b >> c >> d >> e;

    printf("%.3f", (a + b + c + d + e) / 5);

    return 0;
}

Python:

scores = list(map(int,input().strip().split()))
average = sum(scores)/len(scores)
print('%.3f' % average)