Open
Conversation
liza0525
approved these changes
Mar 19, 2026
Contributor
liza0525
left a comment
liza0525
left a comment
There was a problem hiding this comment.
이번주도 고생하셨습니다! 이해하기 쉬운 방향으로 문제를 풀어주셔서 많이 배워갑니다!
| if ch.isalnum(): | ||
| cleaned_s += ch.lower() | ||
|
|
||
| return cleaned_s == cleaned_s[::-1] |
Contributor
There was a problem hiding this comment.
이런 풀이도 가능하겠네요! 코드가 깔끔해지는 풀이라고 생각되네요 :)
다만 문자열의 반까지만 나눠서 풀이를 하는 것도 가능하겠습니다~!
for i in range(len(cleaned_s // 2):
if cleaned_s[i] != cleaned_s [len(cleaned_s) -1 - i]:
return False # early return 처리!| return cleaned_s == cleaned_s[::-1] | ||
|
|
||
| # Time Complexity : O(n) | ||
| # Space Complexity : O(n) |
Contributor
There was a problem hiding this comment.
투포인터를 이용하면 공간복잡도도 O(1)까지 줄일 수 있습니다🙌
| @@ -0,0 +1,27 @@ | |||
| class Solution: | |||
| def hammingWeight(self, n: int) -> int: | |||
| # 1. Find highest power of 2 range that covers n | |||
Contributor
There was a problem hiding this comment.
커버 가능한 2의 거듭제곱수를 먼저 구하고 역으로 계산하신 방법으로 푸신 거군요!
직관적으로 이해하기 쉬운 방법인 것 같습니다 👍🏼
10진수를 2진수로 변경하는 문제는 나누기 연산자와 모듈러 연산자로도 풀이가 가능해서
저는 그런 방식으로 풀어보았습니다!
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
답안 제출 문제
작성자 체크 리스트
In Review로 설정해주세요.검토자 체크 리스트
Important
본인 답안 제출 뿐만 아니라 다른 분 PR 하나 이상을 반드시 검토를 해주셔야 합니다!