import math, sequtils, strutils

let
  abcd = stdin.readLine.split.map parseInt
  pqrst = stdin.readLine.split.map parseInt
  t = pqrst[4]
var
  sum = 0

for i in 0 .. 3:
  sum += abcd[i] * pqrst[i]

echo:
  if sum <= t: "Yes"
  else: "No"