diff options
Diffstat (limited to 'prolog/problems/family_relations/sister_2/common.py')
| -rw-r--r-- | prolog/problems/family_relations/sister_2/common.py | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/prolog/problems/family_relations/sister_2/common.py b/prolog/problems/family_relations/sister_2/common.py index 1bc9365..1234985 100644 --- a/prolog/problems/family_relations/sister_2/common.py +++ b/prolog/problems/family_relations/sister_2/common.py @@ -26,7 +26,8 @@ hint_type = { 'y_can_be_of_any_gender': Hint('y_can_be_of_any_gender'), 'x_y_must_be_different': Hint('x_y_must_be_different'), 'neq_used_too_early': Hint('neq_used_too_early'), - 'nm_instead_of_neq': Hint('nm_instead_of_neq'), + 'neq+_instead_of_neq': Hint('neq+_instead_of_neq'), + 'predicate_always_false': Hint('predicate_always_false'), } test_cases = [ @@ -107,9 +108,13 @@ def hint(code, aux_code): prolog.engine.ask_one(engine_id, 'sister(_, Y), male(Y)') == 'false': return [{'id': 'y_can_be_of_any_gender'}] - # use of \= instead of \== - if prolog.util.Token('NEQ', '\=') in tokens: - return [{'id': 'nm_instead_of_neq'}] + # use of \= or =\= instead of \== + if prolog.util.Token('NEQU', '\=') in tokens or prolog.util.Token('NEQA', '=\=') in tokens: + return [{'id': 'neq+_instead_of_neq'}] + + # target predicate seems to always be false + if prolog.engine.ask_one(engine_id, 'sister(_, _)') == 'false': + return [{'id': 'predicate_always_false'}] # X and Y must be different # this is the last code-specific hint (when everything else doesn't trigger anymore) |