program answer
  implicit none

  integer :: A, V, B, W, T

  read(*,*) A, V
  read(*,*) B, W
  read(*,*) T

  if(W>=V) then
     write(*,*) 'NO'
     stop
  end if
  
  if(A<B) then
   if(B+W*T<=A+V*T) then
     write(*,*) 'YES'
   else
     write(*,*) 'NO'
    end if
 else
    if(B-W*T<=A-V*T) then
       write(*,*) 'YES'
    else
       write(*,*) 'NO'
    end if
  end if

  stop
 end program answer