object Main extends App {
  val a =  scala.io.StdIn.readLine()
  val aArray = a.split(" ").map(_.toInt).toSeq
  val aPos = aArray(0)
  val aHayasa = aArray(1)

  val b =  scala.io.StdIn.readLine()
  val bArray = b.split(" ").map(_.toInt).toSeq
  val bPos = bArray(0)
  val bHayasa = bArray(1)

  val t = scala.io.StdIn.readInt()

  if (aPos < 0 && bPos >= 0) {
    if (bPos - aPos - (aHayasa * t - bHayasa * t) <= 0) {
      println("YES")
    } else {
      println("NO")
    }
  } else if (aPos >= 0 && bPos < 0) {
    if (aPos - bPos - (aHayasa * t - bHayasa * t) <= 0) {
      println("YES")
    } else {
      println("NO")
    }
  } else {
    if (Math.abs(bPos - aPos) - (aHayasa * t - bHayasa * t) <= 0) {
      println("YES")
    } else {
      println("NO")
    }
  }
}