      PROGRAM Tag
      IMPLICIT NONE
      INTEGER,PARAMETER :: prec = 16
      integer(prec) :: a,b,v,w,t
      integer(prec) :: dist,Vsub
      
      read*,a,v
      read*,b,w
      read*,t
      
      dist = abs( a-b )
      Vsub = v-w
      
      
      if( dist<=Vsub*t )then
        print'(A)','YES'
      else
        print'(A)','NO'
      end if
      
      
      stop
      !debugg
      
      
      
      END PROGRAM