diff --git a/buggy.py b/buggy.py
--- a/buggy.py
+++ b/buggy.py
@@ -17,7 +17,7 @@
     return False
 
 
-left, right = 0, 10**10
+left, right = 0, 10**15
 while right - left > 1:
     mid = (right + left) // 2
     if isok(mid):
