[jiunshinn] WEEK01 solutions #1692
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DaleSeo
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Jul 22, 2025
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| # 시간 복잡도 : o(n) | ||
| # 공간 복잡도 o(n) |
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시간 복잡도에는 :를 쓰시고, 공간 복잡도에는 쓰시지 않는 이유가 궁금하네요?
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| class Solution: | ||
| def containsDuplicate(self, nums: List[int]) -> bool: | ||
| seen = set() |
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집합을 사용하는 이 풀이가 위에 사전을 쓰는 풀이보다 더 깔끔한 것 같습니다!
printjin-gmailcom
approved these changes
Jul 26, 2025
| for i, n in enumerate(nums): | ||
| diff = target - n | ||
| if diff in hashmap: | ||
| return [i, hashmap[diff]] |
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리턴 시 인덱스 순서가 문제 요구사항과 맞지 않을 수 있으므로 return [i, hashmap[diff]] 대신 return [hashmap[diff], i]로 수정하는 것이 안전합니다.
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답안 제출 문제
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