diff --git a/library/grader.py b/library/grader.py
index fcccfc1..b98e56c 100644
--- a/library/grader.py
+++ b/library/grader.py
@@ -1,4 +1,4 @@
-x = input()
+x = input() + 1
 
 mat = [[0,0,1,0],[0,1,0,1],[1,0,2,0],[0,2,0,1]]
 mod = 10**9+7