object Main extends App {
  val inputs: Seq[String] = scala.io.Source.stdin.getLines().toList
  
  val tracker = inputs(0).split(" ").map(_.toInt)
  val a = tracker(0)
  val v = tracker(1)
  val runaway = inputs(1).split(" ").map(_.toInt)
  val b = runaway(0)
  val w = runaway(1)
  val t = inputs(2).toInt

  println(solve(a, v, b, w, t))

  private def solve(a: Int, v: Int, b: Int, w: Int, t: Int): String = {
    if(a < b) {
      val speedDiff = v - w
      val positiondiff = Math.abs(b - a)

      if(0 < speedDiff && (positiondiff / speedDiff) <= t) {
        return "YES"
      } else {
        return "NO"
      }
    } else {
      val speedDiff = w - v
      val positiondiff = Math.abs(a - b)

      if(0 < speedDiff && (positiondiff / speedDiff) <= t) {
        return "YES"
      } else {
        return "NO"
      }
    }
  }
}