fn main() {
    let mut a = String::new();
    std::io::stdin().read_line(&mut a).ok();
    let a: usize = a.trim().parse().unwrap();
    let mut b = String::new();
    std::io::stdin().read_line(&mut b).ok();
    let b: usize = b.trim().parse().unwrap();
    let mut c = String::new();
    std::io::stdin().read_line(&mut c).ok();
    let c: usize = c.trim().parse().unwrap();

    let b_count = a / b + if a % b == 0 { 0 } else { 1 };
    let c_count = a / c + if a % c == 0 { 0 } else { 1 };
    if b_count * 2 >= c_count * 3 {
        println!("YES");
    } else {
        println!("NO");
    }
}