#include <bits/stdc++.h>
using namespace std;
long long x,n,i,dem,t;
int main()
{
cin>>n;
dem=0;
t=0;
for (i=1; i<=n; i++)
{
cin>>x;
if (x>0)
{
dem++;
t=t+x;
}
}
cout<<"So so duong la: "<<dem<<endl;
cout<<"Trung binh cong cac so duong la: "<<fixed<<setprecision(2)<<(t*1.0)/(dem*1.0);
return 0;
}