YES
O(n^2)
TRS:
 {
           not(false()) -> true(),
            not(true()) -> false(),
        evenodd(x, 0()) -> not(evenodd(x, s(0()))),
  evenodd(s(x), s(0())) -> evenodd(x, 0()),
   evenodd(0(), s(0())) -> false()
 }
 Natural interpretation:
  Strict:
   {
             not(false()) -> true(),
              not(true()) -> false(),
          evenodd(x, 0()) -> not(evenodd(x, s(0()))),
    evenodd(s(x), s(0())) -> evenodd(x, 0()),
     evenodd(0(), s(0())) -> false()
   }
  Weak:
   {}
  Interpretation class: deltarestricted
  [0](delta) = + 3 + 0*delta
  [s](delta, X0) = + 0*X0 + 0 + 1*X0*delta + 6*delta
  [evenodd](delta, X1, X0) = + 0*X0 + 0*X1 + 0 + 4*X0*delta + 1*X1*delta + 0*delta
  [true](delta) = + 0 + 0*delta
  [not](delta, X0) = + 1*X0 + 0 + 0*X0*delta + 1*delta
  [false](delta) = + 0 + 0*delta
  
  s_tau_1(delta) = delta/(0 + 1 * delta)
  evenodd_tau_1(delta) = delta/(0 + 1 * delta)evenodd_tau_2(delta) = delta/(0 + 4 * delta)
  
  not_tau_1(delta) = delta/(1 + 0 * delta)
  
  
  Qed