WORST_CASE(?,O(n^2)) Solution: --------- "Cons" :: ["A"(0, 0) x "A"(15, 3)] -(12)-> "A"(12, 3) "Cons" :: ["A"(0, 0) x "A"(5, 0)] -(5)-> "A"(5, 0) "Cons" :: ["A"(0, 0) x "A"(12, 0)] -(12)-> "A"(12, 0) "Cons" :: ["A"(0, 0) x "A"(4, 2)] -(2)-> "A"(2, 2) "Cons" :: ["A"(0, 0) x "A"(2, 0)] -(2)-> "A"(2, 0) "False" :: [] -(0)-> "A"(5, 15) "Nil" :: [] -(0)-> "A"(12, 0) "Nil" :: [] -(0)-> "A"(12, 3) "Nil" :: [] -(0)-> "A"(5, 0) "Nil" :: [] -(0)-> "A"(13, 15) "Nil" :: [] -(0)-> "A"(14, 4) "True" :: [] -(0)-> "A"(0, 13) "app" :: ["A"(5, 0) x "A"(2, 2)] -(1)-> "A"(2, 0) "goal" :: ["A"(14, 15)] -(16)-> "A"(0, 0) "naiverev" :: ["A"(12, 3)] -(15)-> "A"(2, 0) "notEmpty" :: ["A"(12, 0)] -(13)-> "A"(0, 3) Cost Free Signatures: --------------------- "Cons" :: ["A"_cf(0, 0) x "A"_cf(3, 0)] -(3)-> "A"_cf(3, 0) "Cons" :: ["A"_cf(0, 0) x "A"_cf(10, 7)] -(3)-> "A"_cf(3, 7) "Cons" :: ["A"_cf(0, 0) x "A"_cf(0, 0)] -(0)-> "A"_cf(0, 0) "Nil" :: [] -(0)-> "A"_cf(3, 0) "Nil" :: [] -(0)-> "A"_cf(15, 15) "Nil" :: [] -(0)-> "A"_cf(15, 12) "Nil" :: [] -(0)-> "A"_cf(0, 0) "app" :: ["A"_cf(3, 0) x "A"_cf(3, 4)] -(0)-> "A"_cf(3, 0) "app" :: ["A"_cf(0, 0) x "A"_cf(0, 0)] -(0)-> "A"_cf(0, 0) "naiverev" :: ["A"_cf(3, 0)] -(0)-> "A"_cf(3, 0) Base Constructors: ------------------ "\"Cons\"_A" :: ["A"(0, 0) x "A"(1, 0)] -(1)-> "A"(1, 0) "\"Cons\"_A" :: ["A"(0, 0) x "A"(1, 1)] -(0)-> "A"(0, 1) "\"False\"_A" :: [] -(0)-> "A"(1, 0) "\"False\"_A" :: [] -(0)-> "A"(0, 1) "\"Nil\"_A" :: [] -(0)-> "A"(1, 0) "\"Nil\"_A" :: [] -(0)-> "A"(0, 1) "\"True\"_A" :: [] -(1)-> "A"(1, 0) "\"True\"_A" :: [] -(0)-> "A"(0, 1)