[hi-rachel] WEEK 08 solutions#1895
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hi-rachel merged 3 commits intoDaleStudy:mainfrom Sep 14, 2025
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printjin-gmailcom
approved these changes
Sep 11, 2025
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| from collections import Counter |
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Counter 대신 dict를 써도 좋을 것 같아요
palindromic-substrings/hi-rachel.py
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| def countSubstrings(self, s: str) -> int: | ||
| count = 0 | ||
| for center in range(len(s)): | ||
| print(center) |
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디버깅용이라면 삭제하거나 로깅 수준으로 조절 필요할 것 같습니다
| - 홀수 길이: center = 0 ~ n-1 (expand(i, i)) | ||
| - 짝수 길이: center = 0 ~ n-1 (expand(i, i+1)) | ||
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| TC: O(N^2) |
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시간 복잡도는 O(N^2)이 맞지만, 긴 문자열 입력에서는 최적화(예: DP 방식)도 고려 가능 할 것 같습니다
hyer0705
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Sep 13, 2025
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슬라이딩 윈도우 알고리즘을 사용하신 걸까요? 저도 비슷하게 풀이해서 코드를 이해하기 쉬웠습니다! l이나 r 이라는 변수명이 짧지만 가독성을 해치진 않네요!
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모든 중심점에서 좌우로 확장하면서 하는 방법도 있다는 것을 배울 수 있었습니다. 저는 DP로 풀었는데 @hi-rachel 님이 풀이한 방법으로도 풀이를 해봐야겠네요!
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감사합니다 !! |
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