2 files changed, 17 insertions, 5 deletions
diff --git a/prolog/problems/lists/conc_3/common.py b/prolog/problems/lists/conc_3/common.py
index 6efac47..ffd8f0f 100644
--- a/prolog/problems/lists/conc_3/common.py
+++ b/prolog/problems/lists/conc_3/common.py
@@ -26,14 +26,11 @@ test_cases = [
         [{}]),
 ]
 
-def test(program, solved_problems):
-    code = (program + '\n' +
-            server.problems.solutions_for_problems('prolog', solved_problems))
-
+def test(code, aux_code):
     n_correct = 0
     engine_id = None
     try:
-        engine_id, output = prolog.engine.create(code=code, timeout=1.0)
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0)
         if engine_id is not None and 'error' not in map(itemgetter(0), output):
             # Engine successfully created, and no syntax error in program.
             for query, answers in test_cases:
diff --git a/prolog/problems/lists/conc_3/sl.py b/prolog/problems/lists/conc_3/sl.py
new file mode 100644
index 0000000..15e3163
--- /dev/null
+++ b/prolog/problems/lists/conc_3/sl.py
@@ -0,0 +1,15 @@
+# coding=utf-8
+
+name = 'conc/3'
+slug = 'Združi dva seznama (konkatenacija)'
+
+description = '''\
+<p><code>conc(L1, L2, L)</code>: seznam <code>L</code> dobiš tako, da seznamu <code>L1</code> na konec dodaš elemente seznama <code>L2</code>.</p>
+<pre>
+  ?- conc([1,2], [3,4], X).
+    X = [1,2,3,4].
+  ?- conc(X, [], [1,2,3]).
+    X = [1,2,3].
+</pre>'''
+
+hint = {}