#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n,a[105],max=0,p;
    cin >> n;
    for(int i=1;i<=n;i++)
    {
        cin >> a[i];
        if(a[i]>max)
        {
            max=a[i];
            p=i;
        }
    }
    cout << fixed <<setprecision(2);
    cout << 3.14*max*max << " ";
    cout <<p;
}