#include <iostream>

using namespace std;

void main()
{
    int N,i,tmp;
    float y=0;
    cin>>N;
    for (i=1;i<=N;i++)
    {
        cin>>tmp;
        y+=tmp;
    }
    y/=N;
    printf("%0.1f",y);
}

I think you misunderstood the problem.What you caculated is the mean or average of the data ,Not the median.If you don't know what the median means,Please read the problem again carefully.