program main
    use,intrinsic :: iso_fortran_env
    implicit none
    integer(int64):: a,v,b,w,t

    read*, a,v
    read*, b,w
    read*, t

    if (t*v >= abs(b-a)+w*t) then
        print'(a)', 'YES'
    else
        print'(a)', 'NO'
    end if
end program main