program TOKYO_B
  integer(8)::A,B,T,V,W
  read(*,*)A,V
  read(*,*)B,W
  read(*,*)T
  if(abs(A-B)/real(V-W)>T .or. V-W<0) then
     write(*,'(a)')'NO'
  else
     write(*,'(a)')'YES'
  end if
end program 