Test Grocery3

Jan Burse, created Jun 30. 2019
/**
* CLP(FD) code for the modified 7-11 problem.
*
* A kid goes into a grocery store and buys three items. The cashier
* charges $6.42. The kid pays and is about to leave when the cashier
* calls the kid back, and says "Hold on, I multiplied the three items
* instead of adding them; I'll try again... Gosh, with adding them
* the price still comes to $6.42"! What were the prices of the
* three items?
*
* Adaptation of a problem from professor Doug Brumbaugh.
*
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:- current_prolog_flag(dialect, jekejeke) -> true
; use_module(library(clpfd)).
:- current_prolog_flag(dialect, jekejeke)
-> use_module(library(finite/clpfd)); true.
% grocery3(-List)
X = [A,B,C],
X ins 0..642,
A*B*C #= 6420000,
A+B+C #= 642,
A #>= B,
B #>= C,
label(X).
% Picat test:
% import cp
% X = [A,B,C], X :: 0..642, A*B*C #= 6420000, A+B+C #= 642, A #>= B, B #>= C, time((solve(X))).
% CPU time 0.0 seconds.

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