WORST_CASE(?,O(n^1))

Solution:
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  "0" :: [] -(0)-> "Nat"(0)
  "0" :: [] -(0)-> "Nat"(2)
  "minus" :: ["Nat"(2) x "Nat"(0)] -(1)-> "Nat"(2)
  "quot" :: ["Nat"(2) x "Nat"(0)] -(1)-> "Nat"(0)
  "s" :: ["Nat"(2)] -(2)-> "Nat"(2)
  "s" :: ["Nat"(0)] -(0)-> "Nat"(0)


Cost Free Signatures:
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