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-rw-r--r--prolog/problems/lists/shiftleft_2/common.py13
1 files changed, 13 insertions, 0 deletions
diff --git a/prolog/problems/lists/shiftleft_2/common.py b/prolog/problems/lists/shiftleft_2/common.py
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+++ b/prolog/problems/lists/shiftleft_2/common.py
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+id = 113
+group = 'lists'
+number = 20
+visible = True
+facts = None
+
+solution = '''\
+conc113([], L, L).
+conc113([H|T], L2, [H|L]) :-
+ conc113(T, L2, L).
+shiftleft([H|T], L2) :-
+ conc113(T, [H], L2).
+'''