YES
O(n^2)
TRS:
 {
      +(0(), y) -> y,
     +(s(x), y) -> s(+(x, y)),
      -(x, 0()) -> x,
      -(0(), y) -> 0(),
  -(s(x), s(y)) -> -(x, y)
 }
 Natural interpretation:
  Strict:
   {
        +(0(), y) -> y,
       +(s(x), y) -> s(+(x, y)),
        -(x, 0()) -> x,
        -(0(), y) -> 0(),
    -(s(x), s(y)) -> -(x, y)
   }
  Weak:
   {}
  Interpretation class: deltarestricted
  [-](delta, X1, X0) = + 1*X0 + 1*X1 + 0 + 0*X0*delta + 0*X1*delta + 1*delta
  [s](delta, X0) = + 1*X0 + 1 + 0*X0*delta + 1*delta
  [0](delta) = + 0 + 0*delta
  [+](delta, X1, X0) = + 1*X0 + 1*X1 + 0 + 0*X0*delta + 1*X1*delta + 1*delta
  -_tau_1(delta) = delta/(1 + 0 * delta)-_tau_2(delta) = delta/(1 + 0 * delta)
  s_tau_1(delta) = delta/(1 + 0 * delta)
  
  +_tau_1(delta) = delta/(1 + 1 * delta)+_tau_2(delta) = delta/(1 + 0 * delta)
  
  Qed