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()
 }
 DUP: We consider a non-duplicating system.
  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()
   }
  Matrix Interpretation:
   Interpretation class: triangular
         [0]
   [0] = [3]
   
       [X1]    [1 0][X1]   [5]
   [s]([X0]) = [0 0][X0] + [0]
   
             [X3]  [X1]    [1 0][X3]   [1 3][X1]   [0]
   [evenodd]([X2], [X0]) = [0 0][X2] + [0 0][X0] + [1]
   
            [0]
   [true] = [1]
   
         [X1]    [1 1][X1]   [0]
   [not]([X0]) = [0 1][X0] + [0]
   
             [0]
   [false] = [1]
   
   
   Qed