#include <bits/stdc++.h> using namespace std; int main() { int n; cin>>n; int a[n]; int max = 0; for(int i = 1;i <= n;i++) { cin>>a[i]; if(max < a[i]) { max = a[i]; } } int note = 0; int r = 0; for(int i = 1;i <= n;i++) { if(a[i] == max) { note = i; r = a[i]; break; } } printf("%.2f",3.14 * r * r); cout<<" "<<note<<endl; return 0; }