use std::collections::BinaryHeap;


fn main() {
    let mut nxm = String::new();
    std::io::stdin().read_line(&mut nxm).ok();
    let nxm: Vec<usize> = nxm.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = nxm[0];
    let x = nxm[1];
    let m = nxm[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 mut used = 0usize;
    let mut cnt = 0usize;
    for i in (0..n).rev() {
        while (a[i] >> cnt) >= x {
            cnt += 1;
            used += i+1;
        }
    }
    if used > m {
        println!("No");
    } else {
        println!("Yes");
    }
}