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[doh6077] WEEK 10 solutions#2271

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TonyKim9401 merged 4 commits intoDaleStudy:mainfrom
doh6077:main
Jan 17, 2026
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[doh6077] WEEK 10 solutions#2271
TonyKim9401 merged 4 commits intoDaleStudy:mainfrom
doh6077:main

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@doh6077 doh6077 commented Jan 13, 2026

๋‹ต์•ˆ ์ œ์ถœ ๋ฌธ์ œ

์ž‘์„ฑ์ž ์ฒดํฌ ๋ฆฌ์ŠคํŠธ

  • Projects์˜ ์˜ค๋ฅธ์ชฝ ๋ฒ„ํŠผ(โ–ผ)์„ ๋ˆŒ๋Ÿฌ ํ™•์žฅํ•œ ๋’ค, Week๋ฅผ ํ˜„์žฌ ์ฃผ์ฐจ๋กœ ์„ค์ •ํ•ด์ฃผ์„ธ์š”.
  • ๋ฌธ์ œ๋ฅผ ๋ชจ๋‘ ํ‘ธ์‹œ๋ฉด ํ”„๋กœ์ ํŠธ์—์„œ Status๋ฅผ In Review๋กœ ์„ค์ •ํ•ด์ฃผ์„ธ์š”.
  • ์ฝ”๋“œ ๊ฒ€ํ† ์ž 1๋ถ„ ์ด์ƒ์œผ๋กœ๋ถ€ํ„ฐ ์Šน์ธ์„ ๋ฐ›์œผ์…จ๋‹ค๋ฉด PR์„ ๋ณ‘ํ•ฉํ•ด์ฃผ์„ธ์š”.

๊ฒ€ํ† ์ž ์ฒดํฌ ๋ฆฌ์ŠคํŠธ

Important

๋ณธ์ธ ๋‹ต์•ˆ ์ œ์ถœ ๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ๋‹ค๋ฅธ ๋ถ„ PR ํ•˜๋‚˜ ์ด์ƒ์„ ๋ฐ˜๋“œ์‹œ ๊ฒ€ํ† ๋ฅผ ํ•ด์ฃผ์…”์•ผ ํ•ฉ๋‹ˆ๋‹ค!

  • ๋ฐ”๋กœ ์ด์ „์— ์˜ฌ๋ผ์˜จ PR์— ๋ณธ์ธ์„ ์ฝ”๋“œ ๋ฆฌ๋ทฐ์–ด๋กœ ์ถ”๊ฐ€ํ•ด์ฃผ์„ธ์š”.
  • ๋ณธ์ธ์ด ๊ฒ€ํ† ํ•ด์•ผํ•˜๋Š” PR์˜ ๋‹ต์•ˆ ์ฝ”๋“œ์— ํ”ผ๋“œ๋ฐฑ์„ ์ฃผ์„ธ์š”.
  • ํ† ์š”์ผ ์ „๊นŒ์ง€ PR์„ ๋ณ‘ํ•ฉํ•  ์ˆ˜ ์žˆ๋„๋ก ์Šน์ธํ•ด์ฃผ์„ธ์š”.

@TonyKim9401
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@DaleStudy ๋ฆฌ๋ทฐํ•ด์ค˜

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dalestudy bot commented Jan 17, 2026

์•ˆ๋…•ํ•˜์„ธ์š”! ์—ฌ๋Ÿฌ ๋ฌธ์ œ์— ๋Œ€ํ•ด ๊น”๋”ํ•˜๊ฒŒ ๊ตฌํ˜„ํ•˜๊ณ , ๋‹ค์–‘ํ•œ ์ ‘๊ทผ๋ฒ•์„ ์‹œ๋„ํ•˜์‹  ์ ์ด ์ธ์ƒ์ ์ž…๋‹ˆ๋‹ค. ์ „์ฒด์ ์œผ๋กœ ๊ฐ€๋…์„ฑ๋„ ์ข‹๊ณ , ์ฃผ์„์„ ํ†ตํ•ด ์˜๋„๋ฅผ ์ž˜ ์ „๋‹ฌํ•˜์…จ๋„ค์š”. ๋ช‡ ๊ฐ€์ง€ ์ œ์•ˆ๋“œ๋ฆฌ์ž๋ฉด:

  1. ์‹œ๊ฐ„/๊ณต๊ฐ„ ๋ณต์žก๋„ ๋ช…์‹œ ์š”์ฒญ: ๊ฐ ์†”๋ฃจ์…˜์— ๋Œ€ํ•ด TC: O(...), SC: O(...)๋ฅผ ์ถ”๊ฐ€ํ•˜์‹œ๋ฉด, ์„ฑ๋Šฅ ์ดํ•ด๋„์™€ ๋ฆฌ๋ทฐ์˜ ๋ช…ํ™•์„ฑ์ด ๋†’์•„์ง‘๋‹ˆ๋‹ค. ํŠนํžˆ, ์žฌ๊ท€์  ๋˜๋Š” ๊ทธ๋ฆฌ๋”” ์ ‘๊ทผ๋ฒ•์˜ ์‹œ๊ฐ„ ๋ณต์žก๋„๋ฅผ ๋ช…ํ™•ํžˆ ํ‘œ๊ธฐํ•˜๋Š” ์Šต๊ด€์€ ๋งค์šฐ ์ข‹์Šต๋‹ˆ๋‹ค.

  2. ๊ตฌ์ฒด์ ์ธ ์‹œ๊ฐ„๋ณต์žก๋„ ๊ฒ€์ฆ: jump-game์˜ ๋‘ ์†”๋ฃจ์…˜์€ ๊ฐ๊ฐ O(n)๊ณผ O(n)์œผ๋กœ ํŒ๋‹จ๋ฉ๋‹ˆ๋‹ค. ํŠนํžˆ, ๊ทธ๋ฆฌ๋”” ๋ฐฉ์‹์€ ์ตœ์ ์˜ ํ•ด๋ฒ•์ด๋‹ˆ ์ ํ•ฉํ•˜๋ฉฐ, ๋ช…ํ™•ํ•˜๊ฒŒ ํ‘œ๊ธฐํ•˜๋Š” ๊ฒƒ์ด ์ข‹๊ฒ ์Šต๋‹ˆ๋‹ค.

  3. ์ฝ”๋“œ ์Šคํƒ€์ผ๊ณผ ๊ฐ€๋…์„ฑ: ์ผ๋ถ€ ์ฃผ์„์˜ ์œ„์น˜๊ฐ€ ์•ฝ๊ฐ„ ๋ถˆ๋ช…ํ™•ํ•˜๊ฑฐ๋‚˜, ์กฐ๊ฑด๋ฌธ์— ๊ฐ„๋‹จํ•œ ์„ค๋ช…์ด ๋” ๋“ค์–ด๊ฐ€๋ฉด ์ดํ•ด๋„๊ฐ€ ๋†’์•„์งˆ ๊ฒƒ ๊ฐ™์Šต๋‹ˆ๋‹ค. ์˜ˆ๋ฅผ ๋“ค์–ด, search in rotated array์—์„œ ์ด์ง„ ํƒ์ƒ‰ ๊ณผ์ •์— ๋Œ€ํ•ด ๊ฐ„๋‹จํ•œ ์„ค๋ช…์„ ๋”ํ•˜๋ฉด ์ข‹์Šต๋‹ˆ๋‹ค.

  4. ์ค‘๋ณต ์ฝ”๋“œ์™€ ๋ถˆํ•„์š”ํ•œ ์ฃผ์„ ์ •๋ฆฌ: search in rotated sorted array์˜ ๋งˆ์ง€๋ง‰ ๋ถ€๋ถ„์€ ์ฃผ์„์ด ์ค‘๋ณต๋˜๊ณ  ๋ถˆํ•„์š”ํ•œ ์ฝ”๋“œ๋„ ํ•จ๊ป˜ ๋‚จ์•„์žˆ๋Š” ๊ฒƒ ๊ฐ™์Šต๋‹ˆ๋‹ค. ๋ฐฐํฌ ์ „์—๋Š” ์ •๋ฆฌํ•˜๋Š” ๊ฒƒ๋„ ์ถ”์ฒœ๋“œ๋ฆฝ๋‹ˆ๋‹ค.

  5. ๋” ๋‚˜์€ ์ ‘๊ทผ๋ฒ• ์ œ์•ˆ: ํ˜„์žฌ ๊ตฌํ˜„์€ ์ถฉ๋ถ„ํžˆ ํšจ์œจ์ ์ž…๋‹ˆ๋‹ค. ๋‹ค๋งŒ, search in rotated array์—์„œ๋Š” ์ฐพ๊ธฐ ์œ„ํ•ด ์ตœ์†Œ๊ฐ’ ์œ„์น˜๋ฅผ ์ฐพ๋Š” ๋ฐฉ๋ฒ•์ด ๊ฐ€์žฅ ์ง๊ด€์ ์ด๋‹ˆ, ์ด ์ ‘๊ทผ๋ฒ•์„ ์ถ”์ฒœ๋“œ๋ฆฝ๋‹ˆ๋‹ค. ๋˜ํ•œ, binary search๋ฅผ ํ™œ์šฉํ•˜๋Š” ๋ฐฉ์‹์€ ์ด๋ฏธ ์ตœ์ ์ด๋‹ˆ, ํ˜„์žฌ ๋ฐฉ๋ฒ• ์œ ์ง€ํ•˜์…”๋„ ์ข‹์Šต๋‹ˆ๋‹ค.

  6. ์ „๋ฐ˜์ ์ธ ๊ฒฉ๋ ค: ์—ฌ๋Ÿฌ ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•˜์‹œ๋ฉด์„œ ๋‹ค์–‘ํ•œ ๋ฐฉ๋ฒ•์„ ์‹œ๋„ํ•˜์…จ๊ณ , ์ฃผ์„๊ณผ ๊ตฌ์กฐ๋„ ์ž˜ ๋˜์–ด ์žˆ์–ด ๋งค์šฐ ์ธ์ƒ์ ์ž…๋‹ˆ๋‹ค. ์•ž์œผ๋กœ๋„ ์ด๋Ÿฐ ์ฒด๊ณ„์ ์ธ ์ฝ”๋“œ ์ž‘์„ฑ ์Šต๊ด€์„ ๊ณ„์† ์œ ์ง€ํ•˜์‹œ๋ฉด ๋”์šฑ ๋ฐœ์ „ํ•˜์‹ค ์ˆ˜ ์žˆ์„ ๊ฒ๋‹ˆ๋‹ค!

์ด ๋ฆฌ๋ทฐ๊ฐ€ ์•ž์œผ๋กœ์˜ ์ฝ”๋“œ ์ž‘์„ฑ์— ๋„์›€์ด ๋˜๊ธธ ๋ฐ”๋ž๋‹ˆ๋‹ค. ๊ณ„์†ํ•ด์„œ ์ข‹์€ ๋ฌธ์ œ ํ’€์ด ๊ธฐ๋Œ€ํ•˜๊ฒ ์Šต๋‹ˆ๋‹ค!

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10์ฃผ์ฐจ ๋ฌธ์ œ ํ’€์ด ๊ณ ์ƒํ•˜์…จ์Šต๋‹ˆ๋‹ค.
๋ฌธ์ œ ํ’€์ด ๋ฐ ์„ค๋ช…์„ ๋ชจ๋‘ ์˜์–ด๋กœ ์ง„ํ–‰ํ•ด ์ฃผ์‹œ๋‹ค๋‹ˆ.. ๋ฉ‹์ง€์‹ญ๋‹ˆ๋‹ค.
์ด์ œ 1/3 ๋‚จ์•˜๋„ค์š”. ํ•œ๋‹ฌ ์กฐ๊ธˆ ๋‚จ์€ ๊ธฐ๊ฐ„๋™์•ˆ ํž˜๋‚ด์„ธ์š”!

@TonyKim9401 TonyKim9401 merged commit cceeb81 into DaleStudy:main Jan 17, 2026
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