0020. valid parentheses #3
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nodchip
reviewed
Aug 15, 2024
| stack.pop() | ||
| else: | ||
| return False | ||
| if len(stack) != 0: |
| if bracket == "(" or bracket == "[" or bracket == "{": | ||
| stack.append(bracket) | ||
| else: | ||
| if bracket == ")" and stack[-1] == "(": |
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step2 のように、括弧と閉じかっこの関係を dict に入れて処理したほうがシンプルだと思います。
| class Solution: | ||
| def isValid(self, s: str) -> bool: | ||
| stack = [] | ||
| closeToOpen = { ")" : "(", "]" : "[", "}" : "{"} |
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変数名は lower_camel で書くことをお勧めいたします。
https://peps.python.org/pep-0008/#function-and-variable-names
Function names should be lowercase, with words separated by underscores as necessary to improve readability.
Variable names follow the same convention as function names.
https://google.github.io/styleguide/pyguide.html#316-naming
local_var_name
| closeToOpen = { ")" : "(", "]" : "[", "}" : "{" } | ||
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| for c in s: | ||
| if c in closeToOpen: |
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early return してネストを下げたほうが見やすいかもと思ったのですが、あまり変わらないかもしれません…。
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問題: 20. Valid Parentheses
https://leetcode.com/problems/valid-parentheses/description/
言語: Python