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yap-6.3/packages/gecode/clp_examples/send_more_money.yap

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2013-11-03 14:12:38 +00:00
%% -*- prolog -*-
%%=============================================================================
%% Copyright (C) 2011, 2013 by Denys Duchier, Vitor Santos Costa
%%
%% This program is free software: you can redistribute it and/or modify it
%% under the terms of the GNU Lesser General Public License as published by the
%% Free Software Foundation, either version 3 of the License, or (at your
%% option) any later version.
%%
%% This program is distributed in the hope that it will be useful, but WITHOUT
%% ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
%% FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
%% more details.
%%
%% You should have received a copy of the GNU Lesser General Public License
%% along with this program. If not, see <http://www.gnu.org/licenses/>.
%%=============================================================================
:- use_module(library(gecode/clpfd)).
% S E N D
% + M O R E
% ---------
% M O N E Y
send_more_money(Letters) :-
[S,E,N,D,M,O,R,Y] = Letters,
Letters ins 0..9,
M #\= 0,
S #\= 0,
all_distinct(Letters),
1000*S + 100*E + 10*N + D +
1000*M + 100*O + 10*R + E #=
10000*M + 1000*O + 100*N + 10*E + Y,
labeling([], Letters).