WORST_CASE(?,O(n^1)) Solution: --------- f :: [A(15) x A(15)] -(15)-> A(15) f :: [A(0) x A(0)] -(0)-> A(0) f :: [A(1) x A(1)] -(1)-> A(1) g :: [A(15) x A(1)] -(14)-> A(0) h :: [A(15) x A(15)] -(15)-> A(15) h :: [A(1) x A(1)] -(1)-> A(1) h :: [A(0) x A(0)] -(0)-> A(0) Cost Free Signatures: --------------------- f :: [A_cf(0) x A_cf(0)] -(0)-> A_cf(0) g :: [A_cf(0) x A_cf(0)] -(0)-> A_cf(0) h :: [A_cf(0) x A_cf(0)] -(0)-> A_cf(0) Base Constructors: ------------------ f_A :: [A(1) x A(1)] -(1)-> A(1) h_A :: [A(1) x A(1)] -(1)-> A(1)