problist = list(map(int, input().split()))
time = list(map(int, input().split()))

for i in range(len(problist)):
    if i == 0:
        a = problist[i] * time[i]
    elif i == 1:
        b = problist[i] * time[i]
    elif i == 2:
        c = problist[i] * time[i]
    elif i == 3:
        d = problist[i] * time[i]

sum = a + b + c + d
limit = time[-1]

if sum <= limit:
    print("Yes")
else:
    print("No")