#include <iostream>
#include <cstdio>

using namespace std;

int main()
{
    int N;
    double sum;
    scanf("%d", &N);
    for(int i = 0; i < N; i++)
    {
        int p;
        scanf("%d", &p);
        sum += (double)p;
    }
    sum /= double(N);
    printf("%.6lf", sum);
    return 0;
}

Man you're awesome! I'm sure your solution is the best among 3000 others!

Not true.You should initialize sum = 0 or it will be a trash number.

Edited by author 09.09.2012 18:47

Edited by author 09.09.2012 18:47

Congratulation!!! >_<