//
//  main.swift
//  atCoderTest
//
//  Created by jun on 2020/05/23.
//  Copyright © 2020 jun. All rights reserved.
//

import Foundation

func solution() -> String {
   let AV = readLine()!.components(separatedBy: " ").map { Int($0)! }
   let BW = readLine()!.components(separatedBy: " ").map { Int($0)! }
   let A = AV.first!
   let V = AV.last!
   let B = BW.first!
   let W = BW.last!
   let T = Int(readLine()!)!
   
   let BetweenAtoB = abs(A - B)
   let speedAtoB = V - W
   
   if B < A {
      let speed = W - V
      if speed <= 0 { return "NO" }
      var a = 0
      for _ in 1 ... T {
         a += speed
         if a == BetweenAtoB { return "YES" }
      }
      return "NO"
   }

   var a = 0
   for _ in 1 ... T {
      a += speedAtoB
      if a == BetweenAtoB { return "YES" }
   }
   return "NO"
}

print(solution())



