Imports System

Module Program
    Sub Main(args As String())

        Dim sInputA As String() = Console.ReadLine().Split(" ")
        Dim sInputB As String() = Console.ReadLine().Split(" ")
        Dim sInputT As Long = Console.ReadLine()
        Dim iPositionA As Long = Long.Parse(sInputA(0))
        Dim iSpeedA As Long = Long.Parse(sInputA(1))
        Dim iPositionB As Long = Long.Parse(sInputB(0))
        Dim iSpeedB As Long = Long.Parse(sInputB(1))

        Dim Result As String = "No"

        If iSpeedA < iSpeedB Then
            Result = "No"
        ElseIf Math.Abs(iPositionA - iPositionB) <= sInputT * (iSpeedA - iSpeedB) Then
            Result = "Yes"
        Else
            Result = "No"
        End If

        Console.WriteLine(Result)

    End Sub
End Module
