YES
O(n^2)
TRS:
 {   f(0()) -> cons(0()),
  f(s(0())) -> f(p(s(0()))),
  p(s(0())) -> 0()}
 Natural interpretation:
  Strict:
   {   f(0()) -> cons(0()),
    f(s(0())) -> f(p(s(0()))),
    p(s(0())) -> 0()}
  Weak:
   {}
  Interpretation class: deltarestricted
  [s](delta, X0) = + 0*X0 + 1 + 1*X0*delta + 0*delta
  [p](delta, X0) = + 0*X0 + 0 + 1*X0*delta + 0*delta
  [f](delta, X0) = + 0*X0 + 1 + 2*X0*delta + 2*delta
  [0](delta) = + 0 + 0*delta
  [cons](delta, X0) = + 0*X0 + 0 + 2*X0*delta + 0*delta
  s_tau_1(delta) = delta/(0 + 1 * delta)
  p_tau_1(delta) = delta/(0 + 1 * delta)
  f_tau_1(delta) = delta/(0 + 2 * delta)
  
  cons_tau_1(delta) = delta/(0 + 2 * delta)
  
  Qed