fn read_line() -> String {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).unwrap();
    s.trim().to_owned()
}

fn reads<T>() -> Vec<T>
where
    T: std::str::FromStr,
    <T as std::str::FromStr>::Err: std::fmt::Debug,
{
    read_line()
        .split_whitespace()
        .map(|w| w.parse().unwrap())
        .collect()
}

fn main() {
    let (n, m, x) = {
        let t: Vec<i32> = reads();
        (t[0], t[1], t[2])
    };

    println!("{}", if m + x - n >= 3 { "YES" } else { "NO" });
}