From 15e24a8f25c143fd3e58ca602afc1641580bd85f Mon Sep 17 00:00:00 2001
From: sangge-rockpi <2251250136@qq.com>
Date: Sat, 20 Jan 2024 13:45:03 +0800
Subject: [PATCH] update 20

---
 leetcode/20.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/leetcode/20.py b/leetcode/20.py
index e4eb84d..26da62c 100644
--- a/leetcode/20.py
+++ b/leetcode/20.py
@@ -10,6 +10,7 @@ class Solution:
             try:
                 stack_top = stack.pop()
             except IndexError:
+                stack.append(i)
                 continue
 
             try: