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oda
reviewed
Jan 4, 2026
| def canAttendMeetings(self, intervals: List[Interval]) -> bool: | ||
| heapq.heapify(intervals) | ||
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| previous_end = -1 |
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問題の制約が0以上かもしれませんが、変なのを突っ込まれる可能性があるので、個人的には好みません。
これは一種の番兵なのでなくても書けるし、len(intervals) が正であることを確認したら intervals[0].start などでもいいですね。
tokuhirat
reviewed
Jan 5, 2026
Comment on lines
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| def interval_lt(self, other): | ||
| if self.start < other.start: | ||
| return True | ||
| return False | ||
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| Interval.__lt__ = interval_lt |
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無理やり __lt__ を実装できるの面白いですね。
def interval_lt(self, other):
return self.start < other.startでよいと思いました。
heapify を使うと in-place に置き換えられるので注意が必要だなと思いました。
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問題文（代用）：https://neetcode.io/problems/meeting-schedule/question