fn main() {
    let mut xx = String::new();
    std::io::Read::read_to_string(&mut std::io::stdin(), &mut xx).ok();
    let xx: Vec<i64> = xx.split_whitespace().flat_map(str::parse).collect();

    let normal_req = xx[0] / xx[1] + (xx[0] % xx[1]).abs().signum();
    let campaign_req = xx[0] / xx[2] + (xx[0] % xx[2]).abs().signum();

    if 3 * campaign_req <= 2 * normal_req {
        println!("YES");
    } else {
        println!("NO");
    }
}