use std::{
    process::exit,
    collections::{
        HashSet,
        HashMap,
    },
};
use proconio::{
    input,
    marker::Chars,
};
// use itertools::*;

fn yes_no(cdt: bool) {
    println!("{}", if cdt {
        "Yes"
    } else {
        "No"
    })
}

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

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

    yes_no(ans <= t);
}