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[DaleSeo] WEEK 13 solutions#2318

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TonyKim9401 merged 1 commit intoDaleStudy:mainfrom
DaleSeo:main
Feb 7, 2026
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[DaleSeo] WEEK 13 solutions#2318
TonyKim9401 merged 1 commit intoDaleStudy:mainfrom
DaleSeo:main

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@DaleSeo DaleSeo commented Feb 6, 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 Feb 7, 2026

์•ˆ๋…•ํ•˜์„ธ์š”! ์ƒˆ๋กœ ์ œ์ถœํ•˜์‹  ์ฝ”๋“œ ์ž˜ ํ™•์ธํ–ˆ์Šต๋‹ˆ๋‹ค. ์ „์ฒด์ ์œผ๋กœ ๊น”๋”ํ•˜๊ณ  ์ฝ๊ธฐ ์‰ฌ์šฐ๋ฉฐ, ํšจ์œจ์ ์ธ ์ ‘๊ทผ๋ฒ•์„ ์‚ฌ์šฉํ•˜์…จ๋„ค์š”. ๋ช‡ ๊ฐ€์ง€ ํ”ผ๋“œ๋ฐฑ์„ ๋“œ๋ฆฌ์ž๋ฉด:

  1. ์‹œ๊ฐ„/๊ณต๊ฐ„ ๋ณต์žก๋„ ํ‘œ๊ธฐ:
    TC: O(n log n), SC: O(1)๋กœ ์ž˜ ๋ช…์‹œํ•˜์…จ์Šต๋‹ˆ๋‹ค. ๋‹ค๋งŒ, intervals.windows(2)๋Š” ๋‚ด๋ถ€์ ์œผ๋กœ O(n) ์‹œ๊ฐ„์ด๋ฉฐ, ์ •๋ ฌ์ด O(n log n)์ด๋ฏ€๋กœ ์ „์ฒด ๋ณต์žก๋„๋Š” ์ •ํ™•ํ•˜๊ฒŒ ๋งž์Šต๋‹ˆ๋‹ค. ์ด ํ‘œ๊ธฐ๋„ ์ข‹์•„์š”.

  2. ์ฝ”๋“œ ๊ฐ€๋…์„ฑ ๋ฐ ์Šคํƒ€์ผ:
    ํ•จ์ˆ˜ ๋ช…๋„ can_attend_meetings๋กœ ์ง๊ด€์ ์ด๊ณ , ์ •๋ ฌ ํ›„ ์ธ์ ‘ ๊ตฌ๊ฐ„ ๋น„๊ต๋„ ๋ช…ํ™•ํ•˜๊ฒŒ ์ด๋ฃจ์–ด์ง‘๋‹ˆ๋‹ค. ๋‹ค๋งŒ, w[0][1] <= w[1][0] ์กฐ๊ฑด์ด ๋งž๋Š”์ง€ ๋‹ค์‹œ ํ•œ๋ฒˆ ์ฒดํฌํ•˜๋Š” ๊ฒƒ์ด ์ข‹๊ฒ ์–ด์š”. (์ผ๋ฐ˜์ ์œผ๋กœ๋Š” w[0][1] <= w[1][0]์ด ํšŒ์˜ ์‹œ๊ฐ„์ด ๊ฒน์น˜์ง€ ์•Š์Œ์„ ์˜๋ฏธํ•˜๋Š”๋ฐ, ์ด ์กฐ๊ฑด์ด ์ •ํ™•ํ•œ์ง€ ๊ฒ€์ฆ ํ•„์š”)

  3. ๋ฒ„๊ทธ ์ˆ˜์ • ์ œ์•ˆ:
    ํ˜„์žฌ ์กฐ๊ฑด์€ all(|w|w[0][1] <= w[1][0])์œผ๋กœ, ๋งŒ์•ฝ ๋‘ ํšŒ์˜๊ฐ€ ๊ฒน์นœ๋‹ค๋ฉด false๋ฅผ ๋ฐ˜ํ™˜ํ•˜๋Š” ๋กœ์ง์ž…๋‹ˆ๋‹ค. ํ•˜์ง€๋งŒ, ์ด ์กฐ๊ฑด์ด ๋ฐ˜๋Œ€๋กœ ๋˜์–ด์•ผ ํ•  ์ˆ˜ ์žˆ์œผ๋‹ˆ, ํ…Œ์ŠคํŠธ ์ผ€์ด์Šค๋ฅผ ํ†ตํ•ด ๊ฒ€์ฆํ•ด๋ณด์„ธ์š”. ์˜ˆ๋ฅผ ๋“ค์–ด, [[0,30],[5,10]]์™€ ๊ฐ™์€ ๊ฒน์น˜๋Š” ๊ฒฝ์šฐ๋ฅผ ๊ณ ๋ คํ•˜๋ฉด, ์กฐ๊ฑด์ด ๋งž๋Š”์ง€ ์žฌํ™•์ธํ•˜์„ธ์š”.

  4. ๊ฐœ์„  ๋ฐฉํ–ฅ:
    ๋งŒ์•ฝ ๊ฐ€๋…์„ฑ์„ ๋” ๋†’์ด๊ณ  ์‹ถ๋‹ค๋ฉด, windows(2) ๋Œ€์‹  ๋ฐ˜๋ณต๋ฌธ์„ ์‚ฌ์šฉํ•˜๋Š” ๊ฒƒ๋„ ๊ณ ๋ คํ•ด๋ณด์„ธ์š”. ์˜ˆ๋ฅผ ๋“ค์–ด:

    for i in 0..intervals.len() - 1 {
        if intervals[i][1] > intervals[i+1][0] {
            return false;
        }
    }

    ์ด๋ ‡๊ฒŒ ํ•˜๋ฉด ์ดํ•ดํ•˜๊ธฐ ๋” ์‰ฌ์šธ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

์ „๋ฐ˜์ ์œผ๋กœ ํ›Œ๋ฅญํ•œ ํ’€์ด์ž…๋‹ˆ๋‹ค. ๊ณ„์†ํ•ด์„œ ์ข‹์€ ์ฝ”๋“œ ์ž‘์„ฑํ•˜์‹œ๊ณ , ์ž‘์€ ๋””ํ…Œ์ผ๋„ ๊ผผ๊ผผํžˆ ๊ฒ€์ฆํ•˜๋Š” ์Šต๊ด€์€ ๋”์šฑ ๊ฐ•๋ ฅํ•œ ์‹ค๋ ฅ ํ–ฅ์ƒ์— ๋„์›€์ด ๋ฉ๋‹ˆ๋‹ค. ํ™”์ดํŒ…!

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๋Ÿฌ์ŠคํŠธ๋Š”...์ž˜ ๋ชจ๋ฅด๊ฒ ์Šต๋‹ˆ๋‹ค๋งŒ ๋‹ฌ๋ ˆ๋‹˜ 13์ฃผ์ฐจ ๊ณ ์ƒํ•˜์…จ์Šต๋‹ˆ๋‹ค!

@TonyKim9401 TonyKim9401 merged commit f824e4d into DaleStudy:main Feb 7, 2026
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