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๐Ÿ›‘ Blocking vs Non-Blocking ๐Ÿ”„ Sync vs Async #23

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suna-ji opened this issue Nov 23, 2024 · 3 comments
Open

๐Ÿ›‘ Blocking vs Non-Blocking ๐Ÿ”„ Sync vs Async #23

suna-ji opened this issue Nov 23, 2024 · 3 comments
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CS ๋ฆฌ์ŠคํŠธ ๋ฐฑ์—”๋“œ ์งˆ๋ฌธ ๋ฆฌ์ŠคํŠธ์˜ ์ง๋ฌด ๊ตฌ๋ถ„์„ ์œ„ํ•œ ๋ผ๋ฒจ

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suna-ji commented Nov 23, 2024

๐Ÿ“ Blocking VS Non-Blocking, Sync VS Async

๐Ÿ“š ์ฃผ์ œ:
Blocking๊ณผ Non-Blocking, ๊ทธ๋ฆฌ๊ณ  Async์™€ Sync์˜ ์ฐจ์ด์ ์„ ์ดํ•ดํ•˜๊ณ  ๊ฐ๊ฐ์˜ ํŠน์ง•๊ณผ ์‚ฌ๋ก€๋ฅผ ํ•™์Šตํ•ฉ๋‹ˆ๋‹ค.


๐ŸŽฏ ์Šคํ„ฐ๋”” ๋ชฉํ‘œ

  • Blocking๊ณผ Non-Blocking์˜ ์ •์˜์™€ ์ฐจ์ด๋ฅผ ๋ช…ํ™•ํžˆ ์ดํ•ดํ•œ๋‹ค.
  • Sync์™€ Async์˜ ๋™์ž‘ ์›๋ฆฌ์™€ ์ฝ”๋“œ ์ƒ์—์„œ์˜ ๊ตฌํ˜„ ์ฐจ์ด๋ฅผ ํ•™์Šตํ•œ๋‹ค.
  • ์‹ค์ œ ์• ํ”Œ๋ฆฌ์ผ€์ด์…˜์—์„œ ๊ฐ ๋ฐฉ์‹์˜ ํ™œ์šฉ ์‚ฌ๋ก€๋ฅผ ์ดํ•ดํ•˜๊ณ  ์žฅ๋‹จ์ ์„ ๋ถ„์„ํ•œ๋‹ค.

๐Ÿ“– ํ•ต์‹ฌ ๋‚ด์šฉ:

1. Blocking vs Non-Blocking

์ œ์–ด๊ถŒ์ด ๊ด€๊ฑด!

Blocking

์ž์‹ ์˜ ์ž‘์—…์„ ์ง„ํ–‰ํ•˜๋‹ค๊ฐ€ ๋‹ค๋ฅธ ์ฃผ์ฒด์˜ ์ž‘์—…์ด ์‹œ์ž‘๋˜๋ฉด ๋‹ค๋ฅธ ์ž‘์—…์ด ๋๋‚  ๋•Œ๊นŒ์ง€ ๊ธฐ๋‹ค๋ ธ๋‹ค๊ฐ€ ์ž์‹ ์˜ ์ž‘์—…์„ ์‹œ์ž‘ํ•˜๋Š” ๊ฒƒ

Non-Blocking

๋‹ค๋ฅธ ์ฃผ์ฒด์˜ ์ž‘์—…์— ๊ด€๋ จ์—†์ด ์ž์‹ ์˜ ์ž‘์—…์„ ํ•˜๋Š” ๊ฒƒ

freepik-untitled-project-20241124070613RMaa

2. Synchronous vs Asynchronous

๊ฒฐ๊ณผ์˜ ์ฒ˜๋ฆฌ๊ฐ€ ๊ด€๊ฑด!

Synchronous

Syn์€ ๊ทธ๋ฆฌ์Šค์–ด๋กœ 'ํ•จ๊ป˜' Chrono๋Š” '์‹œ๊ฐ„' ์ด๋ผ๋Š” ๋œป
ํ˜ธ์ถœํ•˜๋Š” ํ•จ์ˆ˜๊ฐ€ ํ˜ธ์ถœ๋œ ํ•จ์ˆ˜์˜ ์™„๋ฃŒ ์—ฌ๋ถ€๋ฅผ ๋”ฐ์ ธ ์ˆœ์ฐจ๋Œ€๋กœ ์ฒ˜๋ฆฌ

Asynchronous

ํ˜ธ์ถœํ•˜๋Š” ํ•จ์ˆ˜๊ฐ€ ํ˜ธ์ถœ๋œ ํ•จ์ˆ˜์˜ ์ž‘์—… ์™„๋ฃŒ ์—ฌ๋ถ€๋ฅผ ์‹ ๊ฒฝ์“ฐ์ง€ ์•Š๊ณ  ์ฒ˜๋ฆฌ
freepik-untitled-project-202411240731433MBo

3. 4๊ฐ€์ง€ ์กฐํ•ฉ

์œ„์—์„œ ๋ฐฐ์šด 4๊ฐ€์ง€ ๊ฐœ๋…์„ ์กฐํ•ฉํ•ด๋ณด์ž.

๋ฐฑ์—”๋“œ: Blocking vs Non-blocking

Blocking Non-blocking
Synchronous ์ž๋ฐ”์˜ Scanner (์ž…๋ ฅ ๋Œ€๊ธฐ ์ค‘ ํ˜ธ์ถœ์ž ์ฐจ๋‹จ) SocketChannel์œผ๋กœ Non-blocking I/O
Asynchronous Future.get()์œผ๋กœ ๊ฒฐ๊ณผ ๋Œ€๊ธฐ CompletableFuture๋กœ ๋น„๋™๊ธฐ ์ฒ˜๋ฆฌ

ํ”„๋ก ํŠธ์—”๋“œ: Blocking vs Non-blocking

Blocking Non-blocking
Synchronous alert() (์‚ฌ์šฉ์ž ์ž…๋ ฅ ๋Œ€๊ธฐ) ์ด๋ฒคํŠธ ๋ฃจํ”„ ๋‚ด ์ผ๋ฐ˜ ํ•จ์ˆ˜ ์‹คํ–‰
Asynchronous fetch().then() + ๋™๊ธฐ ์ž‘์—… ๋Œ€๊ธฐ fetch().then() (๊ฒฐ๊ณผ๋ฅผ ๋น„๋™๊ธฐ๋กœ ์ฒ˜๋ฆฌ)

Blocking + Synchronous

์ž๋ฐ”์˜ Scanner

  • Blocking:
    ์ œ์–ด๊ถŒ์ด Scanner์˜ ์ž…๋ ฅ ์ž‘์—…์œผ๋กœ ๋„˜์–ด๊ฐ€๋ฉฐ, ์ž…๋ ฅ์ด ์™„๋ฃŒ๋  ๋•Œ๊นŒ์ง€ ํ˜ธ์ถœ์ž๋Š” ๋Œ€๊ธฐ ์ƒํƒœ๊ฐ€ ๋œ๋‹ค.
    ํ˜ธ์ถœ์ž๋Š” ์ž…๋ ฅ์ด ๋๋‚  ๋•Œ๊นŒ์ง€ ๋‹ค๋ฅธ ์ž‘์—…์„ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์—†๋‹ค.
  • Synchronous:
    ์ž…๋ ฅ์ด ์™„๋ฃŒ๋˜์–ด ๊ฒฐ๊ณผ๊ฐ€ ๋ณ€์ˆ˜์— ์ €์žฅ๋œ ์ดํ›„์—๋งŒ ํ˜ธ์ถœ์ž๋Š” ๋‹ค์Œ ์ž‘์—…์œผ๋กœ ์ง„ํ–‰ํ•  ์ˆ˜ ์žˆ๋‹ค.
    ์ž‘์—…์€ ์ˆœ์ฐจ์ ์œผ๋กœ ์ฒ˜๋ฆฌ๋˜๋ฉฐ, ์ž…๋ ฅ ์™„๋ฃŒ ์—ฌ๋ถ€๊ฐ€ ํ˜ธ์ถœ์ž์˜ ํ๋ฆ„์— ์˜ํ–ฅ์„ ๋ฏธ์นœ๋‹ค.
import java.util.Scanner;

public class BlockingSynchronousExample {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.println("์ˆซ์ž๋ฅผ ์ž…๋ ฅํ•˜์„ธ์š”:"); 
        int number = scanner.nextInt(); // ์ œ์–ด๊ถŒ์ด ๋„˜์–ด๊ฐ”๊ณ  ์ž…๋ ฅ์ด ์™„๋ฃŒ๋˜๊ธฐ ์ „๊นŒ์ง€๋Š” ๋‹ค์Œ ์ฝ”๋“œ๋กœ ๋„˜์–ด๊ฐ€์ง€ ์•Š์Œ (blocking) 
                                                              // ์ž…๋ ฅ ํ›„ number ๋ณ€์ˆ˜์— ์ €์žฅ๋˜์–ด์•ผ ๋‹ค์Œ์ค„๋กœ ๋„˜์–ด๊ฐ (synch)

        System.out.println("์ž…๋ ฅ๋œ ์ˆซ์ž: " + number);
        scanner.close();
    }
}

Non-Blocking + Synchronous

SocketChannel์œผ๋กœ Non-blocking I/O

  • Non-blocking: ์ œ์–ด๊ถŒ์€ ํ˜ธ์ถœ์ž(๋ฉ”์ธ ์Šค๋ ˆ๋“œ)์—๊ฒŒ ์ฆ‰์‹œ ๋ฐ˜ํ™˜๋˜๋ฉฐ, ํ˜ธ์ถœ์ž๋Š” ๋‹ค๋ฅธ ์ž‘์—…์„ ์ž์œ ๋กญ๊ฒŒ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์žˆ๋‹ค.
  • Synchronous: ์ž‘์—… ๊ฒฐ๊ณผ๊ฐ€ ๋ฐ˜๋“œ์‹œ ํ•„์š”ํ•˜๊ธฐ ๋•Œ๋ฌธ์—, ํ˜ธ์ถœ์ž๋Š” ์ž‘์—… ์ƒํƒœ๋ฅผ ์ฃผ๊ธฐ์ ์œผ๋กœ ํ™•์ธ(Polling)ํ•˜๋ฉฐ ๊ฒฐ๊ณผ๋ฅผ ๊ธฐ๋‹ค๋ฆฐ๋‹ค.
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;

public class SynchronousNonBlockingExample {
    public static void main(String[] args) {
        try {
            SocketChannel socketChannel = SocketChannel.open();
            socketChannel.configureBlocking(false); // Non-blocking ์„ค์ •
            socketChannel.connect(new InetSocketAddress("example.com", 80)); // ์„œ๋ฒ„์— ์—ฐ๊ฒฐ ์š”์ฒญ์„ ์‹œ์ž‘ํ•˜๊ณ , ์ œ์–ด๊ถŒ์€ ํ˜ธ์ถœ์ž์ธ ๋ฉ”์ธ ์Šค๋ ˆ๋“œ๋กœ ์ฆ‰์‹œ ๋ฐ˜ํ™˜ (Non-blocking)

            while (!socketChannel.finishConnect()) { // Polling: ์—ฐ๊ฒฐ ์ƒํƒœ๋ฅผ ์ฃผ๊ธฐ์ ์œผ๋กœ ํ™•์ธํ•˜๋ฉฐ ์™„๋ฃŒ๋˜๊ธฐ ์ „๊นŒ์ง€ ๋Œ€๊ธฐ (Synchronous)
                System.out.println("์—ฐ๊ฒฐ ์ค‘...");
            }

            String request = "GET / HTTP/1.1\r\nHost: example.com\r\n\r\n";
            ByteBuffer buffer = ByteBuffer.wrap(request.getBytes());
            socketChannel.write(buffer);

            buffer.clear();
            socketChannel.read(buffer);
            System.out.println("์‘๋‹ต: " + new String(buffer.array()));
            socketChannel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Blocking + Asynchronous

Future.get()์œผ๋กœ ๊ฒฐ๊ณผ ๋Œ€๊ธฐ
๋น„๋™๊ธฐ์ ์œผ๋กœ ์ž‘์—…์„ ์‹คํ–‰ํ•œ ํ›„, ๊ฒฐ๊ณผ๋ฅผ ํ•„์š”๋กœ ํ•  ๋•Œ ์ฐจ๋‹จํ•˜๋ฉด์„œ ๊ฒฐ๊ณผ๋ฅผ ๊ฐ€์ ธ์˜ค๋Š” ๋ฐฉ์‹

  • Blocking:
    future.get()์€ ์ž‘์—…์ด ์™„๋ฃŒ๋  ๋•Œ๊นŒ์ง€ ํ˜ธ์ถœ์ž(๋ฉ”์ธ ์Šค๋ ˆ๋“œ)๋ฅผ ์ฐจ๋‹จํ•ฉ๋‹ˆ๋‹ค.
    ํ˜ธ์ถœ์ž๋Š” ๋‹ค๋ฅธ ์ž‘์—…์„ ์ˆ˜ํ–‰ํ•˜์ง€ ๋ชปํ•˜๊ณ , ๊ฒฐ๊ณผ๊ฐ€ ๋ฐ˜ํ™˜๋  ๋•Œ๊นŒ์ง€ ๊ธฐ๋‹ค๋ ค์•ผ ํ•ฉ๋‹ˆ๋‹ค.
  • Asynchronous:
    ์ž‘์—… ์ž์ฒด๋Š” ๋น„๋™๊ธฐ์ ์œผ๋กœ ์‹คํ–‰๋ฉ๋‹ˆ๋‹ค.
    executor.submit()์€ ์ƒˆ๋กœ์šด ์“ฐ๋ ˆ๋“œ์—์„œ ์ž‘์—…์„ ์‹คํ–‰ํ•˜๋ฉฐ, ํ˜ธ์ถœ์ž๋Š” ์ž‘์—…์ด ์ฆ‰์‹œ ์‹œ์ž‘๋จ์„ ๋ณด์žฅ๋ฐ›์ง€๋งŒ ๊ฒฐ๊ณผ๋Š” ๋‚˜์ค‘์— ์ œ๊ณต๋ฉ๋‹ˆ๋‹ค.
    ์ฆ‰, ๊ฒฐ๊ณผ ๋Œ€๊ธฐ๋ฅผ ์ œ์™ธํ•œ ์ž‘์—… ์ฒ˜๋ฆฌ๋Š” ๋น„๋™๊ธฐ์ ์œผ๋กœ ์ˆ˜ํ–‰๋ฉ๋‹ˆ๋‹ค.

Blocking์ด ๋งŽ์•„์ง€๋ฉด ์Šค๋ ˆ๋“œ ํ’€์ด ๊ณ ๊ฐˆ๋˜์–ด ์„ฑ๋Šฅ ์žฅ์• ๋กœ ์ด์–ด์งˆ ์ˆ˜ ์žˆ๊ธฐ ๋•Œ๋ฌธ์— ์‹ค๋ฌด์—์„œ๋Š” Blocking + Async ์กฐํ•ฉ์„ ์ตœ์†Œํ™”ํ•˜๊ณ  ๋Œ€์ฒด ๊ธฐ์ˆ ์„ ์‚ฌ์šฉํ•˜๋Š”๊ฒƒ์ด ๊ถŒ์žฅ๋จ (CompletableFuture, thenApply() ๋“ฑ๋“ฑ)

import java.util.concurrent.*;

public class BlockingAsynchronousExample {
    public static void main(String[] args) {
        ExecutorService executor = Executors.newSingleThreadExecutor();

        Future<Integer> future = executor.submit(() -> { // submit ๋ฉ”์„œ๋“œ๋Š” ๊ฒฐ๊ณผ๋ฅผ ๋‚˜์ค‘์— ์ œ๊ณต (Asynchr)
            Thread.sleep(2000); // ์ž‘์—… ์‹œ๋ฎฌ๋ ˆ์ด์…˜
            return 42; // ๊ฒฐ๊ณผ ๋ฐ˜ํ™˜
        });

        try {
            System.out.println("๊ฒฐ๊ณผ๋ฅผ ๊ธฐ๋‹ค๋ฆฝ๋‹ˆ๋‹ค..."); 
            int result = future.get(); // ์ œ์–ด๊ถŒ์ด ๋„˜์–ด๊ฐ”๊ณ , ๊ฒฐ๊ณผ๋ฅผ ๋ฐ›์„ ๋•Œ๊นŒ์ง€ ํ˜ธ์ถœ์ž๋Š” ์ฐจ๋‹จ๋จ (blocking-sync)
            System.out.println("๊ฒฐ๊ณผ: " + result);
        } catch (InterruptedException | ExecutionException e) {
            e.printStackTrace();
        } finally {
            executor.shutdown();
        }
    }
}

Non-Blocking + Asynchronous

CompletableFuture๋กœ ๋น„๋™๊ธฐ ์ฒ˜๋ฆฌ

  • Non-blocking:
    ์ œ์–ด๊ถŒ์€ ํ˜ธ์ถœ์ž(๋ฉ”์ธ ์Šค๋ ˆ๋“œ)์—๊ฒŒ ์ฆ‰์‹œ ๋ฐ˜ํ™˜๋˜๋ฉฐ, ํ˜ธ์ถœ์ž๋Š” ๊ฒฐ๊ณผ๋ฅผ ๊ธฐ๋‹ค๋ฆฌ์ง€ ์•Š๊ณ  ๋‹ค๋ฅธ ์ž‘์—…(์˜ˆ: "๋‹ค๋ฅธ ์ž‘์—… ์ˆ˜ํ–‰ ์ค‘..." ์ถœ๋ ฅ)์„ ๋ฐ”๋กœ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์žˆ๋‹ค.
    ๊ฒฐ๊ณผ๋Š” ๋‚˜์ค‘์— ์ฝœ๋ฐฑ(thenAccept)์„ ํ†ตํ•ด ์ฒ˜๋ฆฌ๋œ๋‹ค.

  • Asynchronous:
    ์ž‘์—…์ด ๋ณ„๋„์˜ ์“ฐ๋ ˆ๋“œ์—์„œ ์‹คํ–‰๋˜๋ฉฐ, ํ˜ธ์ถœ์ž์™€ ์ž‘์—… ์‹คํ–‰์ด ๋…๋ฆฝ์ ์œผ๋กœ ๋™์ž‘ํ•œ๋‹ค.
    CompletableFuture.supplyAsync()๋Š” ์ƒˆ๋กœ์šด ์“ฐ๋ ˆ๋“œ๋ฅผ ์ƒ์„ฑํ•˜๊ฑฐ๋‚˜ ์“ฐ๋ ˆ๋“œ ํ’€์—์„œ ํ• ๋‹นํ•ด ์ž‘์—…์„ ๋น„๋™๊ธฐ์ ์œผ๋กœ ์ˆ˜ํ–‰ํ•˜๋ฉฐ, ๊ฒฐ๊ณผ ์ฒ˜๋ฆฌ ์—ญ์‹œ ๋‚˜์ค‘์— ์ด๋ฃจ์–ด์ง„๋‹ค.

import java.util.concurrent.CompletableFuture;

public class NonBlockingAsynchronousExample {
    public static void main(String[] args) {
        System.out.println("๋น„๋™๊ธฐ ์ž‘์—… ์‹œ์ž‘");

        CompletableFuture.supplyAsync(() -> {
            try {
                Thread.sleep(2000); // ์ž‘์—… ์‹œ๋ฎฌ๋ ˆ์ด์…˜
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            return 42; // ๊ฒฐ๊ณผ ๋ฐ˜ํ™˜
        }).thenAccept(result -> System.out.println("๊ฒฐ๊ณผ: " + result)); // ๊ฒฐ๊ณผ๋ฅผ ๋น„๋™๊ธฐ๋กœ ์ฒ˜๋ฆฌ

        System.out.println("๋‹ค๋ฅธ ์ž‘์—… ์ˆ˜ํ–‰ ์ค‘...");
        try {
            Thread.sleep(3000); // ๋ฉ”์ธ ์Šค๋ ˆ๋“œ๊ฐ€ ์ข…๋ฃŒ๋˜์ง€ ์•Š๋„๋ก ๋Œ€๊ธฐ
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

๐Ÿ’ก ์ฐธ๊ณ  ์ž๋ฃŒ:
[10๋ถ„ ํ…Œ์ฝ”ํ†ก] ๐Ÿฐ ๋ฉํ† ์˜ Blocking vs Non-Blocking, Sync vs Async
์™„๋ฒฝํžˆ ์ดํ•ดํ•˜๋Š” ๋™๊ธฐ/๋น„๋™๊ธฐ & ๋ธ”๋กœํ‚น/๋…ผ๋ธ”๋กœํ‚น

@suna-ji suna-ji added ๋ฐฑ์—”๋“œ ์งˆ๋ฌธ ๋ฆฌ์ŠคํŠธ์˜ ์ง๋ฌด ๊ตฌ๋ถ„์„ ์œ„ํ•œ ๋ผ๋ฒจ CS ๋ฆฌ์ŠคํŠธ labels Nov 23, 2024
@suna-ji suna-ji self-assigned this Nov 23, 2024
@suna-ji suna-ji changed the title ๋™๊ธฐ vs ๋น„๋™๊ธฐ vsv ๋ธ”๋กœํ‚น vs ๋…ผ๋ธ”๋กœํ‚น ๋™๊ธฐ vs ๋น„๋™๊ธฐ vs ๋ธ”๋กœํ‚น vs ๋…ผ๋ธ”๋กœํ‚น Nov 23, 2024
@suna-ji suna-ji changed the title ๋™๊ธฐ vs ๋น„๋™๊ธฐ vs ๋ธ”๋กœํ‚น vs ๋…ผ๋ธ”๋กœํ‚น ๐Ÿ›‘ Blocking vs Non-Blocking ๐Ÿ”„ Sync vs Async Nov 24, 2024
@jokbalkiller
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Blocking , Non-blocking ์— ๋Œ€ํ•œ ๊ฐœ๋…์€ ๋ชฐ๋ž๋Š”๋ฐ ์ฒ˜์Œ ์•Œ๊ฒŒ ๋˜์—ˆ๋„ค์š”!

@since1909
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since1909 commented Nov 25, 2024

๊ฐœ๋ฐœ ์ค‘์— ๋„ˆ๋ฌด ์ž์—ฐ์Šค๋Ÿฝ๊ฒŒ ์‚ฌ์šฉํ•ด์„œ ๋ณ„๋กœ ์‹ ๊ฒฝ์„ ์•ˆ์“ด ๋ถ€๋ถ„์ด์—ˆ๋Š”๋ฐ ์ด๋ก ์ ์œผ๋กœ ์ •๋ฆฌํ•˜๊ณ  ๋„˜์–ด๊ฐ€๋‹ˆ ์ข‹์€ ๊ฑฐ ๊ฐ™์Šต๋‹ˆ๋‹ค.
Blocking + Async ์กฐํ•ฉ์„ ์ตœ์†Œํ™”ํ•˜๋Š” ๋ฐฉํ–ฅ์œผ๋กœ ๋” ์‹ ๊ฒฝ ์จ์„œ ๊ฐœ๋ฐœ ํ•ด๋ด์•ผ๊ฒ ์Šต๋‹ˆ๋‹ค.

@yuiseo
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yuiseo commented Nov 25, 2024

๊ฐœ๋ฐœํ•  ๋•Œ ๋™๊ธฐ, ๋น„๋™๊ธฐ ๊ฐœ๋…์€ ๋งŽ์ด ์‚ฌ์šฉํ•œ๊ฑฐ ๊ฐ™์€๋ฐ non-blocking, blocking์€ ํฌ๊ฒŒ ์‹ ๊ฒฝ์“ฐ์ง€ ์•Š์•˜๋˜๊ฑฐ ๊ฐ™์•„์š”! ๋•๋ถ„์— 4๊ฐœ์˜ ๊ฐœ๋…์— ๋Œ€ํ•ด์„œ๋„ ๋‹ค์‹œ ์•Œ์•„๋ณผ ์ˆ˜ ์žˆ๋Š” ๊ธฐํšŒ์˜€์Šต๋‹ˆ๋‹ค! ๊ฒŒ๋‹ค๊ฐ€ ํ”„๋ก ํŠธ์—์„œ์˜ ์˜ˆ์‹œ๊นŒ์ง€ ๋ง์”€ํ•ด์ฃผ์…”์„œ ๋“ฃ๋Š”๋ฐ ๋” ๋„์›€์ด ๋˜์—ˆ๋˜๊ฑฐ ๊ฐ™์Šต๋‹ˆ๋‹ค! ๊ฐ์‚ฌํ•ฉ๋‹ˆ๋‹ค!

@yuiseo yuiseo closed this as completed Nov 25, 2024
@suna-ji suna-ji reopened this Dec 22, 2024
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