Open
Conversation
mamo3gr
reviewed
Mar 24, 2026
|
|
||
| # step2: 30分 | ||
| leetcodeの解法を見たら、全組み合わせを確認する解法とソートして確認する解法だった。 | ||
| Pythonだと空間計算量はO(n)だけど、JavaだとO(logn)とのこと。実装アルゴリズムが異なるらしい。 |
There was a problem hiding this comment.
何のことかと思ってGeminiに聞いてみたところ
- PythonはTimsort. 空間計算量は O(n)
- JavaではDual-Pivot Quicksort. 空間計算量は O(log n)
- ただし Arrays.sort() でプリミティブ型をソートする場合。そうでない場合はTimsortが使われる
ということなんですね(裏取りできていませんが)。
mamo3gr
reviewed
Mar 24, 2026
| class Solution: | ||
| def canAttendMeetings(self, intervals: List[List[int]]) -> bool: | ||
| intervals_sorted_by_start = sorted(intervals, key=lambda interval: interval[0]) | ||
| for i in range(len(intervals_sorted_by_start) - 1): |
There was a problem hiding this comment.
itertools.pairwise を使うと分かりやすく書けます。趣味の範囲だと思います。
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
252. Meeting Rooms
253. Meeting Rooms II
問題文