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[hyogshin] WEEK 02 solutions #1741
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''' | ||
풀이: | ||
- t 기준 for loop 돌리고 visited 배열 만들어서 s의 모든 곳을 방문하게 함 | ||
- t 안의 문자가 s에 없고 visited 가 False 인 경우 -> visited 배열 True로 변경 | ||
- but) 중복 문자가 있는 경우 index 사용에 한계가 있음 | ||
- so) t의 문자가 s에 있는 경우 해당 문자를 s 배열에서 탈락시킴 | ||
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시간 복잡도: O(n^2) | ||
- for loop -> O(n) | ||
- digit in list -> 최악의 경우 O(n) | ||
- 최악의 경우 O(n^2) | ||
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공간 복잡도: O(n) | ||
- s 문자열을 리스트로 만듬 -> 문자열 크기는 입력됨 = n -> O(n) | ||
''' | ||
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class Solution: | ||
def isAnagram(self, s: str, t: str) -> bool: | ||
l = list(s) | ||
for d in t: | ||
if d in s and d in l: | ||
l.remove(d) | ||
else: | ||
return False | ||
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if not l: | ||
return True | ||
else: | ||
return False | ||
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리스트에서의 in 체크와 remove()는 매번 선형 탐색이 필요하므로 비효율적. O(n^2) 시간 복잡도 로 collections.Counter, 정렬, 해시맵 기반 풀이 활용 방안 검토 추천합니다
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리뷰 감사합니다!