YES
(ignored inputs)COMMENT submitted by: Yusuke Oi used by secret problem 2019 COPS #1128
Rewrite Rules:
   [ -(0,?x) -> 0,
     -(?x,0) -> ?x,
     -(s(?x),s(?y)) -> -(?x,?y) ]
Apply Direct Methods...
Inner CPs:
   [  ]
Outer CPs:
   [ 0 = 0 ]
Linear
(inner) Parallel CPs:
   [  ]
Toyama (Parallel CPs)
Direct Methods: CR

Combined result: CR
1127.trs: Success(CR)
(0 msec.)