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๐Ÿงฉ Baekjoon 28702 - FizzBuzz

๐Ÿงฉ Baekjoon 28702 - FizzBuzz

๋ฌธ์ œ

FizzBuzz ๋ฌธ์ œ๋Š”ย i = 1, 2, โ€ฆย ์— ๋Œ€ํ•ด ๋‹ค์Œ ๊ทœ์น™์— ๋”ฐ๋ผ ๋ฌธ์ž์—ด์„ ํ•œ ์ค„์— ํ•˜๋‚˜์”ฉ ์ถœ๋ ฅํ•˜๋Š” ๋ฌธ์ œ์ž…๋‹ˆ๋‹ค.

  • โ€Ši๊ฐ€ย 3์˜ ๋ฐฐ์ˆ˜์ด๋ฉด์„œย 5์˜ ๋ฐฐ์ˆ˜์ด๋ฉด โ€œFizzBuzzโ€๋ฅผ ์ถœ๋ ฅํ•ฉ๋‹ˆ๋‹ค.
  • โ€Ši๊ฐ€ย 3์˜ ๋ฐฐ์ˆ˜์ด์ง€๋งŒย 5์˜ ๋ฐฐ์ˆ˜๊ฐ€ ์•„๋‹ˆ๋ฉด โ€œFizzโ€๋ฅผ ์ถœ๋ ฅํ•ฉ๋‹ˆ๋‹ค.
  • โ€Ši๊ฐ€ย 3์˜ ๋ฐฐ์ˆ˜๊ฐ€ ์•„๋‹ˆ์ง€๋งŒย 5์˜ ๋ฐฐ์ˆ˜์ด๋ฉด โ€œBuzzโ€๋ฅผ ์ถœ๋ ฅํ•ฉ๋‹ˆ๋‹ค.
  • โ€Ši๊ฐ€ย 3์˜ ๋ฐฐ์ˆ˜๋„ ์•„๋‹ˆ๊ณ ย 5์˜ ๋ฐฐ์ˆ˜๋„ ์•„๋‹Œ ๊ฒฝ์šฐย i๋ฅผ ๊ทธ๋Œ€๋กœ ์ถœ๋ ฅํ•ฉ๋‹ˆ๋‹ค.

FizzBuzz ๋ฌธ์ œ์—์„œ ์—ฐ์†์œผ๋กœ ์ถœ๋ ฅ๋œ ์„ธ ๊ฐœ์˜ ๋ฌธ์ž์—ด์ด ์ฃผ์–ด์ง‘๋‹ˆ๋‹ค. ์ด๋•Œ, ์ด ์„ธ ๋ฌธ์ž์—ด ๋‹ค์Œ์— ์˜ฌ ๋ฌธ์ž์—ด์€ ๋ฌด์—‡์ผ๊นŒ์š”?

์ž…๋ ฅ

FizzBuzz ๋ฌธ์ œ์—์„œ ์—ฐ์†์œผ๋กœ ์ถœ๋ ฅ๋œ ์„ธ ๊ฐœ์˜ ๋ฌธ์ž์—ด์ด ํ•œ ์ค„์— ํ•˜๋‚˜์”ฉ ์ฃผ์–ด์ง‘๋‹ˆ๋‹ค. ๊ฐ ๋ฌธ์ž์—ด์˜ ๊ธธ์ด๋Š”ย 8ย ์ดํ•˜์ž…๋‹ˆ๋‹ค. ์ž…๋ ฅ์ด ํ•ญ์ƒ FizzBuzz ๋ฌธ์ œ์—์„œ ์—ฐ์†์œผ๋กœ ์ถœ๋ ฅ๋œ ์„ธ ๊ฐœ์˜ ๋ฌธ์ž์—ด์— ๋Œ€์‘๋จ์ด ๋ณด์žฅ๋ฉ๋‹ˆ๋‹ค.

์ถœ๋ ฅ

์—ฐ์†์œผ๋กœ ์ถœ๋ ฅ๋œ ์„ธ ๊ฐœ์˜ ๋ฌธ์ž์—ด ๋‹ค์Œ์— ์˜ฌ ๋ฌธ์ž์—ด์„ ์ถœ๋ ฅํ•˜์„ธ์š”. ์—ฌ๋Ÿฌ ๋ฌธ์ž์—ด์ด ์˜ฌ ์ˆ˜ ์žˆ๋Š” ๊ฒฝ์šฐ, ์•„๋ฌด๊ฑฐ๋‚˜ ํ•˜๋‚˜ ์ถœ๋ ฅํ•˜์„ธ์š”.

์˜ˆ์ œ

โœ… ์ž…๋ ฅ 1

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2
3
Fizz
Buzz
11

โœ… ์ถœ๋ ฅ 1

1
Fizz

โœ… ์ž…๋ ฅ 2

1
2
3
980803
980804
FizzBuzz

โœ… ์ถœ๋ ฅ 2

1
980806

์ž‘์„ฑ ์ฝ”๋“œ

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import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStreamReader;  
  
public class Main {  
	public static void main(String[] args) throws IOException {  
		// 1. ๋ณ€์ˆ˜ ์„ ์–ธ ๋ฐ ์ดˆ๊ธฐํ™”  
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));  
		int result = -1;  
		
		// 2. ์ •์ˆ˜ํ˜•์ผ ๊ฒฝ์šฐ ๊ฒฐ๊ณผ ๋„์ถœ  
		for (int i = 0; i < 3; i++) {  
			String input = br.readLine();  
			if (input.matches("-?\\d+")) {  
				result = Integer.parseInt(input) + 3 - i;  
				break;  
			}  
		}  
		
		// 3. ์กฐ๊ฑด์— ๋”ฐ๋ผ ์ถœ๋ ฅ  
		if (result % 3 == 0 && result % 5 == 0) {  
			System.out.println("FizzBuzz");  
		} else if (result % 3 == 0) {  
			System.out.println("Fizz");  
		} else if (result % 5 == 0) {  
			System.out.println("Buzz");  
		} else {  
			System.out.println(result);  
		}  
	}  
}
  • ์ •๊ทœ์‹์„ ์‚ฌ์šฉํ•ด ์ •์ˆ˜ํ˜•์ผ ๊ฒฝ์šฐ, ํ•ด๋‹น ์‹œ์ ์˜ ์ธ๋ฑ์Šค์™€ ๊ฐ’์„ ํ†ตํ•ด ๊ฒฐ๊ณผ๋ฅผ ๋„์ถœํ•˜์˜€๋‹ค.
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