diff --git a/buggy.py b/buggy.py
--- a/buggy.py
+++ b/buggy.py
@@ -9,7 +9,7 @@
 
 class Solution:
     def minOperationsMaxProfit(
-        self, customers: UndefinedList[int], boardingCost: int, runningCost: int
+        self, customers: List[int], boardingCost: int, runningCost: int
     ) -> int:
         maxProfit = -1
         ans = i = curRounds = curCustomers = rem = 0
