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[ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค] ์นด๋“œ ๋ญ‰์น˜ (java) ๋ณธ๋ฌธ

Back-end/Algorithm

[ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค] ์นด๋“œ ๋ญ‰์น˜ (java)

Nellie Kim 2023. 8. 20. 23:12
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๐Ÿ’‍โ™€๏ธ  ๋ฌธ์ œ ์„ค๋ช…

์ฝ”๋‹ˆ๋Š” ์˜์–ด ๋‹จ์–ด๊ฐ€ ์ ํžŒ ์นด๋“œ ๋ญ‰์น˜ ๋‘ ๊ฐœ๋ฅผ ์„ ๋ฌผ๋กœ ๋ฐ›์•˜์Šต๋‹ˆ๋‹ค. ์ฝ”๋‹ˆ๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๊ทœ์น™์œผ๋กœ ์นด๋“œ์— ์ ํžŒ ๋‹จ์–ด๋“ค์„ ์‚ฌ์šฉํ•ด ์›ํ•˜๋Š” ์ˆœ์„œ์˜ ๋‹จ์–ด ๋ฐฐ์—ด์„ ๋งŒ๋“ค ์ˆ˜ ์žˆ๋Š”์ง€ ์•Œ๊ณ  ์‹ถ์Šต๋‹ˆ๋‹ค.

  • ์›ํ•˜๋Š” ์นด๋“œ ๋ญ‰์น˜์—์„œ ์นด๋“œ๋ฅผ ์ˆœ์„œ๋Œ€๋กœ ํ•œ ์žฅ์”ฉ ์‚ฌ์šฉํ•ฉ๋‹ˆ๋‹ค.
  • ํ•œ ๋ฒˆ ์‚ฌ์šฉํ•œ ์นด๋“œ๋Š” ๋‹ค์‹œ ์‚ฌ์šฉํ•  ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค.
  • ์นด๋“œ๋ฅผ ์‚ฌ์šฉํ•˜์ง€ ์•Š๊ณ  ๋‹ค์Œ ์นด๋“œ๋กœ ๋„˜์–ด๊ฐˆ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค.
  • ๊ธฐ์กด์— ์ฃผ์–ด์ง„ ์นด๋“œ ๋ญ‰์น˜์˜ ๋‹จ์–ด ์ˆœ์„œ๋Š” ๋ฐ”๊ฟ€ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค.

์˜ˆ๋ฅผ ๋“ค์–ด ์ฒซ ๋ฒˆ์งธ ์นด๋“œ ๋ญ‰์น˜์— ์ˆœ์„œ๋Œ€๋กœ ["i", "drink", "water"], ๋‘ ๋ฒˆ์งธ ์นด๋“œ ๋ญ‰์น˜์— ์ˆœ์„œ๋Œ€๋กœ ["want", "to"]๊ฐ€ ์ ํ˜€์žˆ์„ ๋•Œ ["i", "want", "to", "drink", "water"] ์ˆœ์„œ์˜ ๋‹จ์–ด ๋ฐฐ์—ด์„ ๋งŒ๋“ค๋ ค๊ณ  ํ•œ๋‹ค๋ฉด ์ฒซ ๋ฒˆ์งธ ์นด๋“œ ๋ญ‰์น˜์—์„œ "i"๋ฅผ ์‚ฌ์šฉํ•œ ํ›„ ๋‘ ๋ฒˆ์งธ ์นด๋“œ ๋ญ‰์น˜์—์„œ "want"์™€ "to"๋ฅผ ์‚ฌ์šฉํ•˜๊ณ  ์ฒซ ๋ฒˆ์งธ ์นด๋“œ๋ญ‰์น˜์— "drink"์™€ "water"๋ฅผ ์ฐจ๋ก€๋Œ€๋กœ ์‚ฌ์šฉํ•˜๋ฉด ์›ํ•˜๋Š” ์ˆœ์„œ์˜ ๋‹จ์–ด ๋ฐฐ์—ด์„ ๋งŒ๋“ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๋ฌธ์ž์—ด๋กœ ์ด๋ฃจ์–ด์ง„ ๋ฐฐ์—ด cards1, cards2์™€ ์›ํ•˜๋Š” ๋‹จ์–ด ๋ฐฐ์—ด goal์ด ๋งค๊ฐœ๋ณ€์ˆ˜๋กœ ์ฃผ์–ด์งˆ ๋•Œ, cards1๊ณผ cards2์— ์ ํžŒ ๋‹จ์–ด๋“ค๋กœ goal๋ฅผ ๋งŒ๋“ค ์žˆ๋‹ค๋ฉด "Yes"๋ฅผ, ๋งŒ๋“ค ์ˆ˜ ์—†๋‹ค๋ฉด "No"๋ฅผ returnํ•˜๋Š” solution ํ•จ์ˆ˜๋ฅผ ์™„์„ฑํ•ด์ฃผ์„ธ์š”.


โŒ ์ œํ•œ์‚ฌํ•ญ

    • 1 ≤ cards1์˜ ๊ธธ์ด, cards2์˜ ๊ธธ์ด ≤ 10
      • 1 ≤ cards1[i]์˜ ๊ธธ์ด, cards2[i]์˜ ๊ธธ์ด ≤ 10
      • cards1๊ณผ cards2์—๋Š” ์„œ๋กœ ๋‹ค๋ฅธ ๋‹จ์–ด๋งŒ ์กด์žฌํ•ฉ๋‹ˆ๋‹ค.
    • 2 ≤ goal์˜ ๊ธธ์ด ≤ cards1์˜ ๊ธธ์ด + cards2์˜ ๊ธธ์ด
      • 1 ≤ goal[i]์˜ ๊ธธ์ด ≤ 10
      • goal์˜ ์›์†Œ๋Š” cards1๊ณผ cards2์˜ ์›์†Œ๋“ค๋กœ๋งŒ ์ด๋ฃจ์–ด์ ธ ์žˆ์Šต๋‹ˆ๋‹ค.
    • cards1, cards2, goal์˜ ๋ฌธ์ž์—ด๋“ค์€ ๋ชจ๋‘ ์•ŒํŒŒ๋ฒณ ์†Œ๋ฌธ์ž๋กœ๋งŒ ์ด๋ฃจ์–ด์ ธ ์žˆ์Šต๋‹ˆ๋‹ค.

 

 

๐Ÿ’ก  ์ž…์ถœ๋ ฅ ์˜ˆ

 

์ž…์ถœ๋ ฅ ์˜ˆ #1

๋ณธ๋ฌธ๊ณผ ๊ฐ™์Šต๋‹ˆ๋‹ค.

 

์ž…์ถœ๋ ฅ ์˜ˆ #2

cards1์—์„œ "i"๋ฅผ ์‚ฌ์šฉํ•˜๊ณ  cards2์—์„œ "want"์™€ "to"๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ "i want to"๊นŒ์ง€๋Š” ๋งŒ๋“ค ์ˆ˜ ์žˆ์ง€๋งŒ "water"๊ฐ€ "drink"๋ณด๋‹ค ๋จผ์ € ์‚ฌ์šฉ๋˜์–ด์•ผ ํ•˜๊ธฐ ๋•Œ๋ฌธ์— ํ•ด๋‹น ๋ฌธ์žฅ์„ ์™„์„ฑ์‹œํ‚ฌ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค. ๋”ฐ๋ผ์„œ "No"๋ฅผ ๋ฐ˜ํ™˜ํ•ฉ๋‹ˆ๋‹ค.

 

๐Ÿ‘ฉ ๋‚ด ํ’€์ด

class Solution {
    public String solution(String[] cards1, String[] cards2, String[] goal) {
        String answer = "Yes";

        int card1Index = 0;
        int card2Index = 0;

        for (int i = 0; i < goal.length; i++) {
            if(card1Index < cards1.length && goal[i].equals(cards1[card1Index])) {
                card1Index++;
                continue;
            }

            if(card2Index < cards2.length && goal[i].equals(cards2[card2Index])) {
                card2Index++;
                continue;
            }

            answer = "No";
            return answer;
        }

        return answer;
    }
}