fn run() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).unwrap();
    let mut it = s.trim().split_whitespace();
    let a: i64 = it.next().unwrap().parse().unwrap();
    let b: i64 = it.next().unwrap().parse().unwrap();
    let c: i64 = it.next().unwrap().parse().unwrap();
    let d: i64 = it.next().unwrap().parse().unwrap();
    let det = (a - c).pow(2) - 4 * 2 * (b - d);
    if det < 0 {
        println!("No");
    } else if det == 0 {
        println!("Yes");
    } else {
        println!("{} {}", (a + c) as f64 * 0.5, (b + d) as f64 * 0.5);
    }
}

fn main() {
    run();
}