From 83e049b6c655a1400eb32bed01db3271f515e822 Mon Sep 17 00:00:00 2001
From: Arina Dohadailo <arina.dohadailo@student.tuke.sk>
Date: Sat, 17 Oct 2026 21:57:14 +0000
Subject: [PATCH] =?UTF-8?q?=D0=9E=D0=B1=D0=BD=D0=BE=D0=B2=D0=B8=D1=82?=
 =?UTF-8?q?=D1=8C=20u6/matching=5Fbrackets.py?=
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---
 u6/matching_brackets.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/u6/matching_brackets.py b/u6/matching_brackets.py
index 2ab7368..16ffc8f 100644
--- a/u6/matching_brackets.py
+++ b/u6/matching_brackets.py
@@ -1,5 +1,6 @@
 def is_paired (input_string):
     pairs = {")": "(", "]": "[", "}": "{"}
+    opening = set(pairs.values())
     stack = []
     for char in input_string:
         if char in opening: