use std::collections::VecDeque;


fn main() {
    let mut nml = String::new();
    std::io::stdin().read_line(&mut nml).ok();
    let nml: Vec<usize> = nml.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = nml[0];
    let m = nml[1];
    let l = nml[2];
    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 limit = l.max(m);
    let mut used = vec![false; limit+1];
    let mut deque = VecDeque::new();
    deque.push_back(l);
    used[l] = true;
    while let Some(u) = deque.pop_front() {
        for &v in a.iter() {
            let val = (v + u) / 2;
            if limit >= val && !used[val] {
                used[val] = true;
                deque.push_back(val);
            }
        }
    }
    if used[m] {
        println!("Yes");
    } else {
        println!("No");
    }
}