Solved Arai60/22. Generate Parentheses #52
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oda
reviewed
Dec 26, 2025
| return list(parentheses) | ||
| ``` | ||
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|
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| - と思ったが(())(())のような部分的に囲むやつが考慮できていないので失敗 |
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こういう風にしたいならば、はじめの括弧と対応するやつは必ずあるはずなので、
(X)Y
と分ければいいですね。
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どういう実装をイメージされているんでしょうか？
再帰だとできないのかなと思ったんですが、
| ```python | ||
| class Solution: | ||
| def generateParenthesis(self, n: int) -> List[str]: | ||
| if n == 1: |
| - 時間計算量：O(n^n) | ||
| - 各層の計算量が<2k C k | ||
| - 2k C k < k^k なので大体このくらい？ | ||
| - 空間計算量：O(n^n) |
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ですね
下でもう少し正しい見積もりをしてみています
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問題：https://leetcode.com/problems/generate-parentheses/description/