package main

import . "fmt"

func main() {
	var a,b,c,d,p,q,r,s,t int
	Scan(&a,&b,&c,&d,&p,&q,&r,&s,&t)
	if a*p+b*q+c*r+d*s<=t {
		Println("Yes")
	} else {
		Println("No")
	}
}