use proconio::input;

fn main(){
    input!{
        a: [i32; 4],
        b: [i32; 4],
        t: i32,
    }

    let mut ans: i32 = 0;
    for i in 0..4{
        ans += a[i]*b[i];
    }

    println!("{}", if ans <= t{"Yes"} else{"No"});
}