Write a program that checks whether all types of brackets are balanced in the line.
One line that can contain any characters, including three types Siberque: & nbsp;
+, if all types of brackets in the line are balanced, and & nbsp; - otherwise.
{[() ()]}
+
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def is_balanced(text):
"""
Проверяет, сбалансированы ли скобки в строке.
Поддерживаемые типы скобок: (), [], {}.
"""
# Стек для хранения открывающих скобок
stack = []
# Словарь для сопоставления открывающих и закрывающих скобок
brackets_map = {
"(": ")",
"[": "]",
"{": "}"
}
# Множество открывающих скобок для быстрой проверки
opening_brackets = set(brackets_map.keys())
# Множество закрывающих скобок для быстрой проверки
closing_brackets = set(brackets_map.values())
for char in text:
if char in opening_brackets:
# Если символ - открывающая скобка, добавляем её в стек
stack.append(char)
elif char in closing_brackets:
# Если символ - закрывающая скобка
if not stack:
# Если стек пуст, значит для закрывающей скобки нет пары
return False
# Берем последнюю открывающую скобку из стека
last_open_bracket = stack.pop()
# Проверяем, соответствует ли она текущей закрывающей
if brackets_map[last_open_bracket] != char:
return False
# Если после прохода по всей строке стек пуст - все скобки закрыты правильно
return len(stack) == 0
# Основная часть программы
input_string = input()
if is_balanced(input_string):
print("+")
else:
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