diff --git a/lab/prof/int.s b/lab/prof/int.s
index 66240f1..181a7fd 100644
--- a/lab/prof/int.s
+++ b/lab/prof/int.s
@@ -3,6 +3,8 @@
 _interrupt_mem:
   movl 4(%esp), %eax
 L_loop1:
+  subl $1, 0(%eax);
+  jz L_int1
   subl $1, 0(%eax);
   jz L_int1
   jmp L_loop1
diff --git a/lab/prof/main b/lab/prof/main
index e4a9855..0f9b8af 100755
Binary files a/lab/prof/main and b/lab/prof/main differ