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| for (let i = word.length - 1; i >= 0; i--) { |
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저도 비슷하게 정규식으로 필터링하고 비교하는 방식으로 풀었는데, 혹시 투포인터 방식도 고려해보셨나요? 공간복잡도 차이가 있어서 여유되시면 투포인터로도 풀어보시면 재밌을 거예요!
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저는 이 비트 트릭을 처음 알게 됐는데, 로직 자체는 간단한데 n & (n - 1)이 왜 가장 오른쪽 1비트를 지우는지 원리를 이해하는 데 시간이 좀 걸렸어요. 깔끔하게 잘 푸셨네요!
riveroverflows
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Mar 19, 2026
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valid-palindrome, number-of-1-bits 코멘트 남겼습니다. 나머지 문제도 풀고 나서 추가 코멘트 남기겠습니다!
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