1 files changed, 1 insertions, 1 deletions
diff --git a/2011/qual/d/d.py b/2011/qual/d/d.py
index b1b6500..a958c8a 100644
--- a/2011/qual/d/d.py
+++ b/2011/qual/d/d.py
@@ -28,8 +28,8 @@ def solve(a):
                     raise Exception
         except:
             continue
+    assert steps <= (len(a)-1)*2 # upper bound
     return steps
-        
 
 f = open('2.in', 'r')
 o = open('2.out', 'w')