YES
O(n^2)
TRS:
 {f() -> g(),
  c() -> f()}
 Natural interpretation:
  Strict:
   {f() -> g(),
    c() -> f()}
  Weak:
   {}
  Interpretation class: deltarestricted
  [g](delta) = + 0 + 0*delta
  [c](delta) = + 2 + 3*delta
  [f](delta) = + 2 + 1*delta
  
  
  
  
  Qed