use proconio::input;

fn main() {
    input!{
        A: [i32; 4],
        B: [i32; 4],
        T: i32
    }
    let mut sum = 0;
    for i in 0..4{
        sum += A[i] * B[i];
    }
    if sum <= T {
        println!("Yes");
    } else {
        println!("No");
    }
}