diff --git a/4_9_Exercises/Question 4.py b/4_9_Exercises/Question 4.py
index 119f6177d51e8b9b3c2cbe406e1fd8dfcad77421..124d103c2d1967bec0d6520f6f0040f13c0baf30 100644
--- a/4_9_Exercises/Question 4.py	
+++ b/4_9_Exercises/Question 4.py	
@@ -18,7 +18,7 @@ def np(x, y):
             for pos in new_pos:
                 if (pos not in current) and ((0 <= pos[0] <= x) and (0 <= pos[1] <= y)):
                     trace.append(current + [pos])
-    return final
+    return len(final)
 
 
 def np2(x, y, trace=None):