diff --git a/crafter.cs b/crafter.cs
index 1313f19..633ef10 100644
--- a/crafter.cs
+++ b/crafter.cs
@@ -231,8 +231,6 @@ public class CourseCrafter
             }
         } while (rescueChanged);
 
-        OptimizeStudentWishCoverage();
-        OptimizeStudentWishCoverage();
         OptimizeStudentWishCoverage();
 
         bool isStudentFree(int semester, string studentID)