use std::{collections::VecDeque, io::*};
fn main() {
    let mut input: String = String::new();
    std::io::stdin().read_to_string(&mut input).ok();
    let mut itr = input.trim().split_whitespace();
    let n: usize = itr.next().unwrap().parse().unwrap();
    let m: usize = itr.next().unwrap().parse().unwrap();
    let l: usize = itr.next().unwrap().parse().unwrap();
    let a: Vec<usize> = (0..n)
        .map(|_| itr.next().unwrap().parse().unwrap())
        .collect();

    let mut q: VecDeque<usize> = VecDeque::new();
    let mut used = vec![false; 1001];
    used[l] = true;
    q.push_back(l);
    while let Some(v) = q.pop_front() {
        for i in 0..n {
            let nv = (v + a[i]) / 2;
            if !used[nv] {
                used[nv] = true;
                q.push_back(nv);
            }
        }
    }
    println!("{}", if used[m] { "Yes" } else { "No" });
}