fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    let mut abc = String::new();
    std::io::stdin().read_line(&mut abc).ok();
    let abc: Vec<usize> = abc.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let a = abc[0];
    let b = abc[1];
    let c = n-abc[2];

    if a == c {
        println!("No");
        return;
    }
    if (a <= b && b <= c) || (c <= b && b <= a) {
        println!("No")
    } else {
        println!("Yes");
    }
}