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

    let start_win_cnt = a.iter()
        .filter(|&&v| v % (k+1) > 0)
        .count();
    if start_win_cnt == 0 {
        println!("NO");
    } else {
        println!("YES");
    }
}