#include <bits/stdc++.h>
using namespace std;

int main()
{
    double r, R;
    cin >> r >> R;
    double phi = 2 * M_PI - atan2(r, sqrt(R * R - r * r)) * 2;
    cout << phi << "\n" << phi * R * r * 2 + M_PI * r * r << endl;
}