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week 3 - add comment for explaining time complexity
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โ€Ždecode-ways/liza0525.pyโ€Ž

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โ€Žnumber-of-1-bits/liza0525.pyโ€Ž

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# ์‹œ๊ฐ„ ๋ณต์žก๋„: O(log n)
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# - 2๋กœ ๊ณ„์† ๋‚˜๋ˆ„๊ณ , ์ด๋Š” 2์ง„์ˆ˜ ์ž๋ฆฟ์ˆ˜ ๋งŒํผ ๋ฐ˜๋ณตํ•˜๊ธฐ ๋•Œ๋ฌธ
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# ๊ณต๊ฐ„ ๋ณต์žก๋„: O(1)
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# - ๋ณ€์ˆ˜ ๋ช‡ ๊ฐœ๋งŒ ์‚ฌ์šฉ
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class Solution:
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# ์–ด๋–ค ์ˆ˜๋ฅผ 2์ง„์ˆ˜๋กœ ๋ณ€ํ™˜ํ•˜๋Š” ๊ณผ์ •์€ 2๋กœ ๋‚˜๋ˆˆ ํ›„, ๊ทธ ๋‚˜๋จธ์ง€(1 ๋˜๋Š” 0)์„ ๊ฐ€์žฅ ๋†’์€ ์ž๋ฆฌ ์ˆ˜๋ถ€ํ„ฐ ์ˆœ์ฐจ๋กœ ๋‚˜์—ดํ•˜๊ณ 
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# ๋ชซ์„ ๊ทธ ๋‹ค์Œ ํšŒ์ฐจ์˜ ํ”ผ์ œ์ˆ˜๋กœ ์‚ฌ์šฉํ•˜๋ฉด ๋œ๋‹ค.

โ€Žvalid-palindrome/liza0525.pyโ€Ž

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# ๋ฌธ์ž์—ด ๊ธธ์ด๊ฐ€ n์ผ ๋•Œ
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# ์‹œ๊ฐ„ ๋ณต์žก๋„: O(n)
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# - alphanumeric ํ™•์ธํ•  ๋•Œ ์ „์ฒด ๋ฌธ์ž๋ฅผ ์ˆœํšŒํ•˜๋Š” ๊ฒŒ ์ตœ๋Œ€
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# ๊ณต๊ฐ„ ๋ณต์žก๋„: O(n)
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# - ์ตœ์•…์˜ ๊ฒฝ์šฐ๋Š” ์ž…๋ ฅ ์ „์ฒด๊ฐ€ alphanumeric์ผ ๋•Œ(ํŠน์ˆ˜ ๋ฌธ์ž ์—†์„ ๋•Œ)
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class Solution:
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# Alphanumeric ์ŠคํŠธ๋ง ์ด์™ธ์˜ ๋ฌธ์ž์—ด์„ ๋จผ์ € ์ œ์™ธ ์‹œํ‚จ ์ดํ›„ lowercase๋กœ ๋ณ€๊ฒฝํ•œ ๋‹ค์Œ, ์–‘ ๋์—์„œ๋ถ€ํ„ฐ ๋ฌธ์ž์—ด์„ ๋น„๊ตํ•œ๋‹ค.
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def isPalindrome(self, s: str) -> bool:

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