program sample
    implicit none
  
    integer(8) :: i,j,m,n,a,b,v,w,t
    
  
    read(*,*) a,v
    read(*,*)b,w
    read(*,*)t
    if (abs(b-a)<=t*(v-w))then
     write(*,*)'YES'
    else
        write(*,*)'NO'
    end if
    stop
end program sample
  

