use proconio::input;

fn main() {
    input! {
        num_problems: [usize; 4],
        weights: [usize; 4],
        t: usize,
    }

    let sum_times = num_problems
        .iter()
        .zip(&weights)
        .map(|(num, weight)| num * weight)
        .sum::<usize>();
    println!("{}", if sum_times <= t { "Yes" } else { "No" });
}