use std::io::Read;
use std::f64::consts::PI;

fn main() {
    let mut all_data = String::new();
    std::io::stdin().read_to_string(&mut all_data).ok();
    let all_data: Vec<&str> = all_data.trim().split('\n').collect();
    let sr: f64 = all_data.iter().next().unwrap().parse::<f64>().unwrap();
    let lr: f64 = all_data.iter().skip(1).next().unwrap().parse::<f64>().unwrap();

    let cos_theta: f64 = (lr*lr - 2.0*sr*sr) / (lr*lr);
    let theta: f64 = cos_theta.acos();
    let circle: f64 = sr * sr * PI;
    let curv: f64 = ((lr+sr)*(lr+sr) - (lr-sr)*(lr-sr)) * (2.0*PI - theta) / 2.0;
    println!("{}", 2.0*PI - theta);
    println!("{}", circle + curv);
}