YES
O(n^2)
TRS:
 {  f(f(x)) -> f(x),
    f(s(x)) -> f(x),
  g(s(0())) -> g(f(s(0())))}
 Natural interpretation:
  Strict:
   {  f(f(x)) -> f(x),
      f(s(x)) -> f(x),
    g(s(0())) -> g(f(s(0())))}
  Weak:
   {}
  Interpretation class: deltarestricted
  [0](delta) = + 3 + 0*delta
  [g](delta, X0) = + 0*X0 + 0 + 2*X0*delta + 0*delta
  [s](delta, X0) = + 1*X0 + 0 + 0*X0*delta + 2*delta
  [f](delta, X0) = + 0*X0 + 0 + 1*X0*delta + 1*delta
  
  g_tau_1(delta) = delta/(0 + 2 * delta)
  s_tau_1(delta) = delta/(1 + 0 * delta)
  f_tau_1(delta) = delta/(0 + 1 * delta)
  
  Qed