#include <bits/stdc++.h>
using namespace std;
int a[105], n, maxi = 1;
int main(){
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
		if (a[i] > a[maxi]) {
			maxi = i;
		}
	}
	cout << fixed << setprecision(2) << 3.14 * a[maxi] * a[maxi] << &#39; &#39; << maxi;
	return 0; 
}

#include <iostream>
#include <vector>
#include <iomanip>
using namespace std;

int main() {
    int n;
    cin >> n;

    vector<int> radii(n);
    for (int i = 0; i < n; ++i) {
        cin >> radii[i];
    }

    double maxArea = 0;
    int maxIndex = 0;

    for (int i = 0; i < n; ++i) {
        double area = 3.14 * radii[i] * radii[i];
        if (area > maxArea) {
            maxArea = area;
            maxIndex = i + 1; // 编号从1开始
        }
    }

    // 输出保留两位小数 + 编号
    cout << fixed << setprecision(2) << maxArea << " " << maxIndex << endl;

    return 0;
}