/*
  Problem from 
  Banzhaf, Nordin, Keller, Francone: 
  Genetic Programming - An Introduction, page 262

  The function is:
    f(x) = (x-1)^2 + (x-1)^3
  or
    x^3 - 2*x^2 + x
    etc

  Solutions: 
  code = (A + (A * (A * (A - 2)))) = [[[2],2],[[4],36],[[5],80],[[7],252]] = [[1] = 0]


  Using "**":
  maxCount = 5
  code = (A * ((A - 1) ** 2)) = [[[2],2],[[4],36],[[5],80],[[7],252]] = [[1] = 0]


  Cf http://hakank.org/jgap/intro_page_262.conf

*/

data(nordin,Data,Vars,Unknown,Ops,Constants,MaxC) :-
  Data =  [
           [[2],2],
           [[4],36],
           [[5],80],
           [[7],252]
  ],
  Unknown = [1], 
  Vars = ["A"],
  Ops = new_map([infix=["+","-","*","/"]]),
  Constants = 0..3,
  MaxC = 7.