(GOAL COMPLEXITY) (STARTTERM (FUNCTIONSYMBOLS f0)) (VAR A B C) (RULES f1(A, B, C) -> Com_1(f1(A + C, B, C - 1)) [ A >= 1 ] f1(A, B, C) -> Com_1(f1(A + B, B - 1, C)) [ A >= 1 ] f0(A, B, C) -> Com_1(f1(A, B, C)) )