diff options
Diffstat (limited to 'prolog/problems/sets/diff_3/common.py')
-rw-r--r-- | prolog/problems/sets/diff_3/common.py | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/prolog/problems/sets/diff_3/common.py b/prolog/problems/sets/diff_3/common.py new file mode 100644 index 0000000..76b88ed --- /dev/null +++ b/prolog/problems/sets/diff_3/common.py @@ -0,0 +1,19 @@ +id = 130 +group = 'sets' +number = 37 +visible = True +facts = None + +solution = '''\ +memb130(X, [X|_]). +memb130(X, [_|T]) :- + memb130(X, T). + +diff([], _, []). +diff([H|T], S2, [H|D]) :- + \+ memb130(H, S2), + diff(T, S2, D). +diff([H|T], S2, D) :- + memb130(H, S2), + diff(T, S2, D). +''' |