BEST_CASE(Omega(n^1),?) Solution: --------- "0" :: [] -(0)-> "Nat"(1) "checkF" :: ["Q"(0)] -(1)-> "Q"(0) "cons" :: ["Nat"(0) x "L"(0)] -(0)-> "L"(0) "empty" :: [] -(1)-> "Q"(0) "enq" :: ["Nat"(1)] -(1)-> "Q"(0) "errorHead" :: [] -(0)-> "Nat"(0) "errorTail" :: [] -(0)-> "Q"(0) "head" :: ["Q"(0)] -(1)-> "Nat"(0) "nil" :: [] -(0)-> "L"(0) "queue" :: ["L"(0) x "L"(0)] -(0)-> "Q"(0) "rev" :: ["L"(0)] -(1)-> "L"(0) "rev'" :: ["L"(0) x "L"(0)] -(1)-> "L"(0) "s" :: ["Nat"(1)] -(1)-> "Nat"(1) "snoc" :: ["Q"(0) x "Nat"(0)] -(1)-> "Q"(0) "tail" :: ["Q"(0)] -(1)-> "Q"(0) Cost Free Signatures: --------------------- "0" :: [] -(0)-> "Nat"_cf(0) "checkF" :: ["Q"_cf(0)] -(0)-> "Q"_cf(0) "cons" :: ["Nat"_cf(0) x "L"_cf(0)] -(0)-> "L"_cf(0) "empty" :: [] -(0)-> "Q"_cf(0) "enq" :: ["Nat"_cf(0)] -(0)-> "Q"_cf(0) "nil" :: [] -(0)-> "L"_cf(0) "queue" :: ["L"_cf(0) x "L"_cf(0)] -(0)-> "Q"_cf(0) "rev" :: ["L"_cf(0)] -(0)-> "L"_cf(0) "rev'" :: ["L"_cf(0) x "L"_cf(0)] -(0)-> "L"_cf(0) "s" :: ["Nat"_cf(0)] -(0)-> "Nat"_cf(0) "snoc" :: ["Q"_cf(0) x "Nat"_cf(0)] -(0)-> "Q"_cf(0) Base Constructors: ------------------