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

#define PI (2*acos(0.0))

int main(){
    cout << fixed << setprecision(12);
    double r, R;
    cin >> r >> R;
    double t = 2*PI-2*fabs(atan2(r, sqrt(R*R-r*r)));
    cout << t << endl << PI*((R+r)*(R+r)-(R-r)*(R-r))*t/2/PI + PI*r*r << endl;
    return 0;
}