use proconio::input;

fn main() {
    input! {
        a: [usize; 4],
        p: [usize; 4],
        t: usize
    }
    
    println!("{}",
        if a.into_iter().zip(p).fold(0, |acc,(a,p)| acc + a*p) <= t { "Yes" }
        else { "No" }
    )
}