import math

A,V=list(map(int,input().split()))

B,W=list(map(int,input().split()))

T=int(eval(input()))

if V!=W:

    if V>W and math.ceil(abs(B-A)/(V-W))<=T:

        print("YES")

        exit()

print("NO")
A,V=list(map(int,input().split()))

B,W=list(map(int,input().split()))

T=int(eval(input()))

print(("NO" if V==W or V<W or abs(A-B)/(V-W)>T else "YES"))
import math

A, V = list(map(int, input().split()))
B, W = list(map(int, input().split()))
T = int(eval(input()))
if V != W:
    if V > W and math.ceil(abs(B - A) / (V - W)) <= T:
        print("YES")
        exit()
print("NO")

A, V = list(map(int, input().split()))
B, W = list(map(int, input().split()))
T = int(eval(input()))
print(("NO" if V == W or V < W or abs(A - B) / (V - W) > T else "YES"))

-import math - -if V != W: -    if V > W and math.ceil(abs(B - A) / (V - W)) <= T: -        print("YES") -        exit() -print("NO") +print(("NO" if V == W or V < W or abs(A - B) / (V - W) > T else "YES"))