fn main() {
    let (n, x, k): (usize, usize, usize) = {
        let mut line: String = String::new();
        std::io::stdin().read_line(&mut line).unwrap();
        let mut iter = line.split_whitespace();
        (
            iter.next().unwrap().parse().unwrap(),
            iter.next().unwrap().parse().unwrap(),
            iter.next().unwrap().parse().unwrap(),
        )
    };
    let A: Vec<usize> = {
        let mut line: String = String::new();
        std::io::stdin().read_line(&mut line).unwrap();
        line.split_whitespace()
            .map(|x| x.parse().unwrap())
            .collect()
    };

    let mut ans = vec![0;n];

    for i in 0..n{
        let mut a=A[i];
        let mut score=0;

        while a>=x{
            score+=1;
            a/=2;
        }

        ans[i]=score;
    }

    let mut lans=0;
    let mut max_a=0;

    for i in 0..n{
        let xi=n-1-i;

        if ans[xi]>max_a{
            lans+=(ans[xi]-max_a)*(xi+1);
            max_a=ans[xi];
        }
    }

    if lans<=k{
        println!("Yes");
    }
    else{
        println!("No");
    }

}