diff --git a/lottery.py b/lottery.py
index cd198a4..8fc2d7f 100644
--- a/lottery.py
+++ b/lottery.py
@@ -181,7 +181,7 @@ def get_interactive_input():
 
             last_floor = input("请输入参与抽奖的最后楼层(可选，直接回车使用所有楼层): ")
             if last_floor:
-                if not last_floor.isdigit() or int(last_floor) < 0:
+                if not last_floor.isdigit() or int(last_floor) < 1:
                     print("错误: 最后楼层必须为大于0的整数")
                     continue
                 last_floor = int(last_floor)