[DaleSeo] WEEK 03 Solutions#2721
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📊 DaleSeo 님의 학습 현황이번 주 제출 문제
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🤖 이 댓글은 GitHub App을 통해 자동으로 작성되었습니다. 🔢 API 사용량 (gpt-5-nano)
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parkhojeong
approved these changes
Jul 10, 2026
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| impl Solution { | ||
| pub fn hamming_weight(n: i32) -> i32 { | ||
| let mut n = n as u32; | ||
| let mut cnt = 0; | ||
| while n != 0 { | ||
| n &= n - 1; | ||
| cnt += 1; | ||
| } | ||
| cnt | ||
| } |
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오 Brian Kernighan algorithm이라고도 불리는 방식이군요!
rust에선 count_ones()를 사용하면 cpu 의 popcount 가 지원되는 경우 명령어 사이클을 더 줄일 수도 있는 거 같네요 :)
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