Kth largest element in a stream #38
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Priority Queue を自前で実装することを oda さんが推奨されてました。 |
ryoooooory
reviewed
Jul 7, 2024
| def add(self, val: int) -> int: | ||
| # Add new value and pop until len(self._min_heap) == self.k | ||
| heapq.heappush(self._min_heap, val) | ||
| while len(self._min_heap) > self.k: |
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1個ずつしかでないので確かにそれでいいですね
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レビュー完了しました！ |
oda
reviewed
Jul 7, 2024
| def add(self, val: int) -> int: | ||
| if len(self._min_heap) < self.k: | ||
| heappush(self._min_heap, val) | ||
| elif val >= self._min_heap[0]: |
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https://github.com/python/cpython/blob/b765e4adf858ff8a8646f38933a5a355b6d72760/Lib/heapq.py#L163
heappushpop このチェックしてそうですよ。
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知らなかったです。ありがとうございます。
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| if len(self._min_heap) < self.k: | ||
| heappush(self._min_heap, val) | ||
| elif val >= self._min_heap[0]: |
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ありがとうございます。ifとelifの使い分けが自分の中でイマイチできていませんでしたがこの説明が腑に落ちました。
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問題
703. Kth Largest Element in a Stream