Hints for permute/2 updated.

2 files changed, 10 insertions, 1 deletions

diff --git a/prolog/problems/lists/permute_2/common.py b/prolog/problems/lists/permute_2/common.py
index 55c2b48..cbd46d5 100644
--- a/prolog/problems/lists/permute_2/common.py
+++ b/prolog/problems/lists/permute_2/common.py
@@ -28,6 +28,7 @@ hint_type = {
     'predicate_always_false': Hint('predicate_always_false'),
     'base_case': Hint('base_case'),
     'recursive_case': Hint('recursive_case'),
+    'no_insert_or_delete': Hint('no_insert_or_delete'),
     'timeout': Hint('timeout'),
     'base_case_arbitrary': Hint('base_case_arbitrary'),
     'unsuccessful_conc_use': Hint('unsuccessful_conc_use'),
@@ -105,7 +106,10 @@ def hint(code, aux_code):
         # base cases work, the recursive doesn't (but it doesn't timeout)
         # this may be left as the last, most generic hint
         if not prolog.engine.ask_truth(engine_id, 'permute([qa,qb], [qb,qa])'):
-            return [{'id': 'recursive_case'}]
+            if prolog.util.Token('NAME', 'insert') in tokens or prolog.util.Token('NAME', 'del') in tokens:
+                return [{'id': 'recursive_case'}]
+            else:
+                return [{'id': 'no_insert_or_delete'}]
 
     except socket.timeout as ex:
         return [{'id': 'timeout'}]
diff --git a/prolog/problems/lists/permute_2/sl.py b/prolog/problems/lists/permute_2/sl.py
index 8472cab..5e347e4 100644
--- a/prolog/problems/lists/permute_2/sl.py
+++ b/prolog/problems/lists/permute_2/sl.py
@@ -69,6 +69,11 @@ narediti ti z rezultatom, ki ga rekurzija vrne. Skratka, element <code>H</code>
 <p>Robni primer deluje. Kaj pa rekurzivni, splošni, primer?</p>
 ''',
 
+    'no_insert_or_delete': '''\
+<p>Robni primer deluje. Kaj pa rekurzivni, splošni, primer? Morda se ti splača uporabiti kakšno že rešeno
+nalogo s seznami?</p>
+''',
+
     'predicate_always_false': '''\
 <p>Vse kaže, da tvoj predikat vedno vrne "false". Si mu dal pravilno ime, si se morda pri imenu zatipkal?</p>
 <p>Če je ime pravilno, se morda splača preveriti tudi, če se nisi zatipkal kje drugje,