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49-tgyuuAn #174

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merged 2 commits into from
May 3, 2024
Merged

49-tgyuuAn #174

merged 2 commits into from
May 3, 2024

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tgyuuAn
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@tgyuuAn tgyuuAn commented Mar 29, 2024

๐Ÿ”— ๋ฌธ์ œ ๋งํฌ

KCM Travel

๋ฌธ์ œ๊ฐ€ ์‰ฌ์›Œ๋ณด์—ฌ์„œ ์„ ํƒ.

๊ทธ๋ฆฌ๊ณ  ํฐ ์ฝ” ๋ฟŒ๋Ÿฌ์ง

โœ”๏ธ ์†Œ์š”๋œ ์‹œ๊ฐ„

4์‹œ๊ฐ„?

โœจ ์ˆ˜๋„ ์ฝ”๋“œ

image

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  • ์‹ค์ œ๋กœ๋Š” ์ƒ๊ฐํ•˜๊ณ  ํ‘ผ ๊ฒƒ์ด๋ผ ์†Œ๋ชจ ์‹œ๊ฐ„์ด ํ›จ์”ฌ ๋งŽ์Œ.
  • Python์ด๋‚˜ pypy3์œผ๋กœ ํ–ˆ์„ ๋•Œ ๋‹ค์ต์ŠคํŠธ๋ผ๋กœ๋Š” ํ’€๋ฆฌ์ง€ ์•Š๋Š”๋‹ค. DP๋กœ ์ ‘๊ทผํ•ด์•ผํ•จ.







์ฒ˜์Œ์—๋Š” ๋‹ค์ต์ŠคํŠธ๋ผ๋ฅผ ์ด์šฉํ•ด์•ผํ•˜๋‚˜ ? ์‹ถ์—ˆ๋‹ค.

๋‹ค์ต์ŠคํŠธ๋ผ๋ฅผ ์ด์šฉํ•ด์„œ 2์ฐจ์› DP ํ…Œ์ด๋ธ”์„ ๋งŒ๋“  ๋’ค DP[N][C] = T ์—์„œ N๋ฒˆ์งธ ๋…ธ๋“œ์— C ์ฝ”์ŠคํŠธ๋ฅผ ๋“ค์˜€์„ ๋•Œ ์–ป์„ ์ˆ˜ ์žˆ๋Š” ์ตœ์†Œ ์‹œ๊ฐ„์„ ์ €์žฅํ•ด๋‚˜๊ฐ”๋‹ค.

์ด๋ ‡๊ฒŒ ๋งŒ๋“œ๋‹ˆ ๋‹ต์€ ์ž˜ ๋‚˜์™”๋‹ค.

ํ•˜์ง€๋งŒ, ์•„๋ฌด๋ฆฌ ๋…ธ๋ ฅํ•ด๋„ ํŒŒ์ด์ฌ์œผ๋กœ ์‹œ๊ฐ„ ์ดˆ๊ณผ๋ฅผ ๋ฉดํ•  ์ˆ˜๊ฐ€ ์—†์—ˆ๋‹ค.

from collections import defaultdict, deque
import sys

def input(): return sys.stdin.readline().rstrip()

T = int(input())
for _ in range(T):
    N, M, K = map(int, input().split())

    # i ๋ฒˆ์งธ ์ธ๋ฑ์Šค ํ•ญ์˜ ๊ฐ’์—์„œ 1. ๋น„์šฉ 2. ์‹œ๊ฐ„ 3. ์ธ๋ฑ์Šค
    costs = [[int(1e9) for _ in range(M+1)] for x in range(N+1)]
    board = deque([(0, 0, 1)])
    costs[1][1] = 0

    graph = [[] for _ in range(N+1)]
    for _ in range(K):
        start, destination, cost, duration = map(int,input().split())
        graph[start].append((destination, cost, duration))

    # print(edges)

    while board:
        now_cost, now_duration, now_idx = board.popleft()
        
        if now_duration > costs[now_idx][now_cost]: continue
    
        for destination, cost, duration in graph[now_idx]:
            if now_cost + cost > M: continue

            if costs[destination][now_cost + cost] > now_duration + duration:
                costs[destination][now_cost + cost] = now_duration + duration
                
                # ๋„์ฐฉ์ง€์ ์ด ๋ชฉํ‘œ๋ฉด ์‚ฝ์ž…ํ•  ํ•„์š” ์—†์Œ.                
                if destination == N: continue

                board.append((now_cost + cost, now_duration + duration, destination))

    result = min(costs[N])
    print(result) if result != int(1e9) else print("Poor KCM")







์Œ... ๋„์ €ํžˆ ์œ„ ์ฝ”๋“œ์—์„œ ์‹œ๊ฐ„์„ ์ค„์ผ ์ˆ˜ ์žˆ๋Š” ๋ฐฉ๋ฒ•์„ ๋– ์˜ฌ๋ฆฌ์ง€ ๋ชปํ•ด์„œ ์—ด์‹ฌํžˆ ์„œ์นญ์„ ์ง„ํ–‰ํ–ˆ๋‹ค.







ํ—ˆ๊ฑฐ๊ฑฑ...

๋‹ค์ต์ŠคํŠธ๋ผ๋ฅผ ์“ฐ์ง€ ์•Š๊ณ  DP๋งŒ์„ ์ด์šฉํ•ด์„œ ํ‘ธ๋Š” ๋ฐฉ๋ฒ•์ด ์กด์žฌํ–ˆ๋‹ค.







๊ธฐ์กด์— ๊ฐ€๋ฐฉ์— ๋ฌผ๊ฑด์ฑ„์šฐ๊ธฐ ์•Œ๊ณ ๋ฆฌ์ฆ˜์ธ ๋ƒ…์ƒ‰๊ณผ ์œ ์‚ฌํ•˜๊ฒŒ ์•„๋ž˜์™€ ๊ฐ™์ด 2์ค‘ ๋ฐ˜๋ณต๋ฌธ์„ ๋Œ๋ฆฌ๋ฉด ํ•ด๊ฒฐํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค.

์ด ๋•Œ ์ค‘์š”ํ•œ ์ ์€ ๊ฐ€์žฅ ์™ธ๊ณฝ์ด ์ฝ”์ŠคํŠธ์—ฌ์•ผ ํ•˜๊ณ  ๋‚ด๋ถ€์— city๊ฐ€ ์žˆ์–ด์•ผ ํ•œ๋‹ค๋Š” ์ ์ด๋‹ค.

(city๊ฐ€ ์™ธ๊ณฝ์— ์žˆ์„ ๊ฒฝ์šฐ ๋‹ค์ต์ŠคํŠธ๋ผ ์ฒ˜๋Ÿผ ์ฃผ๋ณ€๋…ธ๋“œ๋งŒ์„ ๋จผ์ € ํƒ์ƒ‰ํ•˜๋Š” ๊ฒƒ์ด ์•„๋‹ˆ๋ผ,

๊ฐˆ ์ˆ˜ ์—†๋Š” ์ง€์ ์—์„œ ํƒ์ƒ‰ํ•˜๋Š” ๊ฒฝ์šฐ๊ฐ€ ์ƒ๊ธธ ์ˆ˜ ์žˆ๋‹ค.

์˜ˆ๋ฅผ ๋“ค์–ด 1๋ฒˆ ๋…ธ๋“œ์—์„œ 2๋ฒˆ ๋…ธ๋“œ๋ฅผ ๊ฐ€์ง€ ๋ชปํ•˜๋Š”๋ฐ,

2๋ฒˆ ๋…ธ๋“œ์˜ ํƒ์ƒ‰์„ ์‹œ์ž‘ํ•จ์œผ๋กœ์จ ํ•ด๋‹น ๋…ธ๋“œ๋กœ๋ถ€ํ„ฐ ๊ฐ€๋Š” ํ‹ฐ์ผ“์€ ๋ชจ๋‘ ๋ฌดํšจ๊ฐ€_ ๋˜๋Š” ๊ฒƒ์ฒ˜๋Ÿผ ๋ง์ด๋‹ค.)

for cost in range(M+1):
    for city in range(1, N+1):
        # ... ์ฝ”๋“œ ์ž‘์„ฑ~







PR์€ ๋˜๊ฒŒ ์งง์€๋ฐ ์—ฌ๊ธฐ ๊นŒ์ง€ ์˜ค๋Š”๋ฐ ์—„์ฒญ๋‚œ ์‹œํ–‰ ์ฐฉ์˜ค๋ฅผ ๊ฒช์—ˆ๋‹ค...

PR๋กœ ์“ฐ๊ณ ๋‚˜๋‹ˆ ๋˜๊ฒŒ ํ—ˆ๋ฌดํ•˜๋„ค..

์ด ๋ฌธ์ œ ์•ฝ๊ฐ„ ์•ฑ ๋ฌธ์ œ์˜ ์ƒ์œ„ ํ˜ธํ™˜ ์ธ ๊ฒƒ ๊ฐ™์•„์š”..!

๋˜๊ฒŒ ์–ด๋ ต๊ฒŒ ํ’€์—ˆ๋Š”๋ฐ ์ด๋ ‡๊ฒŒ ๋ฐ–์— ์„ค๋ช…์„ ๋ชปํ•˜๊ฒ ๋”ฐ...

ใ…‹ใ…Œใ…‹ใ…Œใ…‹ใ…‹ใ…‹... ํŒŒ์ดํŒ…!!!!!

ํŒŒ์ด์ฌ ๋‹ค์ต์ŠคํŠธ๋ผ๋กœ ํ’€๋ฉด ๋ฐ‘์— ์จ์ค˜์š”!!

๐Ÿ“š ์ƒˆ๋กญ๊ฒŒ ์•Œ๊ฒŒ๋œ ๋‚ด์šฉ

@tgyuuAn tgyuuAn added tgyuuAn ํ•œ ์ค„๋กœ๋Š” ์†Œ๊ฐœํ•  ์ˆ˜ ์—†๋Š” ๋‚จ์ž. ์ž‘์„ฑ ์ค‘ โฑ๏ธ labels Mar 29, 2024
@tgyuuAn tgyuuAn self-assigned this Mar 29, 2024
@tgyuuAn tgyuuAn marked this pull request as ready for review March 29, 2024 18:06
@9kyo-hwang
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9kyo-hwang commented Mar 30, 2024

์ด๊ฑฐ ์งˆ๋ฌธ๊ฒŒ์‹œํŒ ๋ณด๋‹ˆ๊นŒ 8๋‹ฌ ์ „ ์ฏค์— ๋‹ค์ต์ŠคํŠธ๋ผ ์ €๊ฒฉ ํ…Œ์ผ€ ์ถ”๊ฐ€๋ผ์„œ ์‹น ๋‹ค ๋‚ ๋ผ๊ฐ”๋”๋ผ๊ตฌ์š”;;
๊ทธ๋ž˜์„œ ๊ตฌ๊ธ€๋งํ•ด์„œ ๋‚˜์˜ค๋Š” ์ฝ”๋“œ๋“ค ๋Œ€๋ถ€๋ถ„ ๋‹ค ์ง€๊ธˆ ํ†ต๊ณผ ์•ˆ๋˜๋Š” ์ฝ”๋“œ๋“ค์ด๋”๋ผ๊ตฌ์š” ใ…‹ใ…‹ใ…‹

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C++๋กœ ํ†ต๊ณผํ•œ ๋‹ค์ต์ŠคํŠธ๋ผ ์ฝ”๋“œ ์ค‘ ์ œ์ผ ๋น ๋ฅธ ๊ฑฐ ๋ณ€ํ™˜ํ•˜๋‹ˆ๊นŒ ๊ฒจ์šฐ ํ†ต๊ณผํ•˜๋„ค์š” ใ…‹ใ…‹

from heapq import *
input = open(0).readline

for _ in range(T := int(input())):
    N, M, K = map(int, input().split())
    adj_list = [[] for _ in range(N + 1)]
    distances = [[float('inf')] * (M + 1) for _ in range(N + 1)]
    distances[1] = [0] * (M + 1)

    for _ in range(K):
        u, v, c, d = map(int, input().split())
        adj_list[u].append((v, c, d))
        
    def dijkstra():
        heap = [(0, 1)]
        while heap:
            du, u = heappop(heap)
            if distances[u][M] < du:
                continue
            
            for v, cv, dv in adj_list[u]:
                prev_dist = distances[v][M]
                for cost in range(0, M + 1):
                    if cost + cv > M:
                        break
                    
                    if distances[u][cost] == float('inf'):
                        continue
                    
                    if distances[u][cost] + dv < distances[v][cost + cv]:
                        distances[v][cost + cv] = distances[u][cost] + dv
                
                if prev_dist > distances[v][M]:
                    heappush(heap, (distances[v][M], v))
                    
        return print('Poor KCM' if distances[N][M] == float('inf') else distances[N][M])
        
    dijkstra()

image

์ด๊ฑฐ ๋ฌธ์ œ ์˜๋„ ์ž์ฒด๊ฐ€ DP์ธ๊ฒƒ ๊ฐ™์Šต๋‹ˆ๋‹ค....

@tgyuuAn
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tgyuuAn commented Mar 31, 2024

C++๋กœ ํ†ต๊ณผํ•œ ๋‹ค์ต์ŠคํŠธ๋ผ ์ฝ”๋“œ ์ค‘ ์ œ์ผ ๋น ๋ฅธ ๊ฑฐ ๋ณ€ํ™˜ํ•˜๋‹ˆ๊นŒ ๊ฒจ์šฐ ํ†ต๊ณผํ•˜๋„ค์š” ใ…‹ใ…‹

from heapq import *
input = open(0).readline

for _ in range(T := int(input())):
    N, M, K = map(int, input().split())
    adj_list = [[] for _ in range(N + 1)]
    distances = [[float('inf')] * (M + 1) for _ in range(N + 1)]
    distances[1] = [0] * (M + 1)

    for _ in range(K):
        u, v, c, d = map(int, input().split())
        adj_list[u].append((v, c, d))
        
    def dijkstra():
        heap = [(0, 1)]
        while heap:
            du, u = heappop(heap)
            if distances[u][M] < du:
                continue
            
            for v, cv, dv in adj_list[u]:
                prev_dist = distances[v][M]
                for cost in range(0, M + 1):
                    if cost + cv > M:
                        break
                    
                    if distances[u][cost] == float('inf'):
                        continue
                    
                    if distances[u][cost] + dv < distances[v][cost + cv]:
                        distances[v][cost + cv] = distances[u][cost] + dv
                
                if prev_dist > distances[v][M]:
                    heappush(heap, (distances[v][M], v))
                    
        return print('Poor KCM' if distances[N][M] == float('inf') else distances[N][M])
        
    dijkstra()

image

์ด๊ฑฐ ๋ฌธ์ œ ์˜๋„ ์ž์ฒด๊ฐ€ DP์ธ๊ฒƒ ๊ฐ™์Šต๋‹ˆ๋‹ค....

ํ— C++๋กœ ์‹œ๊ฐ„ ๋ญ์ž„... ํŒŒ์ด์ฌ์œผ๋กœ ์ ˆ๋Œ€ ์•ˆ๋˜๊ฒ ๋‹ค...

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ใ…ˆ.. ์ œ ์ฝ”๋Š” ์•„์ง ๋ถ€๋Ÿฌ์งˆ ์ฝ”๋„ ์•„๋‹ˆ๊ธฐ ๋•Œ๋ฌธ์— ์ด ๋ฌธ์ œ๋Š” ํ‚ตํ•ด๋‘๊ฒ ์Šต๋‹ˆ๋‹ค .. ใ…Žใ…Ž
ํ”Œ๋ ˆํ‹ฐ๋„˜ ๋ณด๊ณ  ๋„๋ง๊ฐ€๋Š”๊ฑฐ ์•„๋‹™๋‹ˆ๋‹ค ..

์ด๊ฑด PR๊ณผ๋Š” ์ƒ๊ด€์—†๋Š” ์ด์•ผ๊ธฐ์ธ๋ฐ ๋ฐฑ์ค€์—์„œ ๊ฒฐ๊ณผ ๋’ค์— ํผ์„ผํŠธ๊ฐ€ ์›๋ž˜ ๋œจ๋‚˜์š”??
์ €๋Š” ํ•ญ์ƒ ํผ์„ผํŠธ ์˜ฌ๋ผ๊ฐ€๋‹ค๊ฐ€ ์ตœ์ข…์ ์œผ๋กœ๋Š” ํผ์„ผํŠธ ์—†์ด ๊ฒฐ๊ณผ๋งŒ ๋œจ๋˜๋ฐ ใ…‡..์–ด๋–ป๊ฒŒ ๋ณด๋‚˜์š”..?!

for _ in range(T):
N, M, K = map(int, input().split())

costs = [[int(1e9) for _ in range(M+1)] for _ in range(N+1)]
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๋ช‡ ๊ธ€์ž ์ฐจ์ด ์•ˆ๋‚˜๊ธด ํ•˜์ง€๋งŒ,, INF = int(1e9)๋กœ ๋”ฐ๋กœ ๋‘๋Š”๊ฒŒ ์–ด๋–จ๊นŒ์š”?
int(1e9)๊ฐ€ ์ž์ฃผ ์‚ฌ์šฉ๋˜๋‹ˆ INF๋กœ ๋”ฐ๋กœ ์ƒ์ˆ˜๋กœ ๋นผ๋‘๋ฉด ๊ฐ€๋…์„ฑ์ด ๋” ์ข‹์•„์งˆ ๊ฒƒ ๊ฐ™์Šต๋‹ˆ๋‹ค ๐Ÿ˜Ž

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ํ—‰ ์™„์ „ ๋™์˜ํ•ฉ๋‹ˆ๋‹ค....! ๐Ÿ˜๐Ÿ˜๐Ÿ˜

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tgyuuAn commented Apr 3, 2024

ใ…ˆ.. ์ œ ์ฝ”๋Š” ์•„์ง ๋ถ€๋Ÿฌ์งˆ ์ฝ”๋„ ์•„๋‹ˆ๊ธฐ ๋•Œ๋ฌธ์— ์ด ๋ฌธ์ œ๋Š” ํ‚ตํ•ด๋‘๊ฒ ์Šต๋‹ˆ๋‹ค .. ใ…Žใ…Ž

ํ”Œ๋ ˆํ‹ฐ๋„˜ ๋ณด๊ณ  ๋„๋ง๊ฐ€๋Š”๊ฑฐ ์•„๋‹™๋‹ˆ๋‹ค ..

์ด๊ฑด PR๊ณผ๋Š” ์ƒ๊ด€์—†๋Š” ์ด์•ผ๊ธฐ์ธ๋ฐ ๋ฐฑ์ค€์—์„œ ๊ฒฐ๊ณผ ๋’ค์— ํผ์„ผํŠธ๊ฐ€ ์›๋ž˜ ๋œจ๋‚˜์š”??

์ €๋Š” ํ•ญ์ƒ ํผ์„ผํŠธ ์˜ฌ๋ผ๊ฐ€๋‹ค๊ฐ€ ์ตœ์ข…์ ์œผ๋กœ๋Š” ํผ์„ผํŠธ ์—†์ด ๊ฒฐ๊ณผ๋งŒ ๋œจ๋˜๋ฐ ใ…‡..์–ด๋–ป๊ฒŒ ๋ณด๋‚˜์š”..?!

์–ด ์ €๋„ ์ด๊ฑฐ ์ค€์„ฑ๋‹˜ํ•œํ…Œ ๋ฐฐ์› ๋Š”๋ฐ ํฌ๋กฌ์— ์žˆ๋Š” ๋ฐฑ์ค€ ์ต์Šคํ…์…˜ ๊น”์•„์•ผํ•ด์š”!! @pknujsp ํ˜น์‹œ ์ด๋ฆ„์ด ๋ญ์˜€์ฌฌ...?

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ใ…ˆ.. ์ œ ์ฝ”๋Š” ์•„์ง ๋ถ€๋Ÿฌ์งˆ ์ฝ”๋„ ์•„๋‹ˆ๊ธฐ ๋•Œ๋ฌธ์— ์ด ๋ฌธ์ œ๋Š” ํ‚ตํ•ด๋‘๊ฒ ์Šต๋‹ˆ๋‹ค .. ใ…Žใ…Ž
ํ”Œ๋ ˆํ‹ฐ๋„˜ ๋ณด๊ณ  ๋„๋ง๊ฐ€๋Š”๊ฑฐ ์•„๋‹™๋‹ˆ๋‹ค ..
์ด๊ฑด PR๊ณผ๋Š” ์ƒ๊ด€์—†๋Š” ์ด์•ผ๊ธฐ์ธ๋ฐ ๋ฐฑ์ค€์—์„œ ๊ฒฐ๊ณผ ๋’ค์— ํผ์„ผํŠธ๊ฐ€ ์›๋ž˜ ๋œจ๋‚˜์š”??
์ €๋Š” ํ•ญ์ƒ ํผ์„ผํŠธ ์˜ฌ๋ผ๊ฐ€๋‹ค๊ฐ€ ์ตœ์ข…์ ์œผ๋กœ๋Š” ํผ์„ผํŠธ ์—†์ด ๊ฒฐ๊ณผ๋งŒ ๋œจ๋˜๋ฐ ใ…‡..์–ด๋–ป๊ฒŒ ๋ณด๋‚˜์š”..?!

์–ด ์ €๋„ ์ด๊ฑฐ ์ค€์„ฑ๋‹˜ํ•œํ…Œ ๋ฐฐ์› ๋Š”๋ฐ ํฌ๋กฌ์— ์žˆ๋Š” ๋ฐฑ์ค€ ์ต์Šคํ…์…˜ ๊น”์•„์•ผํ•ด์š”!! @pknujsp ํ˜น์‹œ ์ด๋ฆ„์ด ๋ญ์˜€์ฌฌ...?

baekjoonhub ์“ฐ์‹œ๋ฉด ๋ฉ๋‹ˆ๋‹ค.

@H0ngJu
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H0ngJu commented Apr 3, 2024

ใ…ˆ.. ์ œ ์ฝ”๋Š” ์•„์ง ๋ถ€๋Ÿฌ์งˆ ์ฝ”๋„ ์•„๋‹ˆ๊ธฐ ๋•Œ๋ฌธ์— ์ด ๋ฌธ์ œ๋Š” ํ‚ตํ•ด๋‘๊ฒ ์Šต๋‹ˆ๋‹ค .. ใ…Žใ…Ž
ํ”Œ๋ ˆํ‹ฐ๋„˜ ๋ณด๊ณ  ๋„๋ง๊ฐ€๋Š”๊ฑฐ ์•„๋‹™๋‹ˆ๋‹ค ..
์ด๊ฑด PR๊ณผ๋Š” ์ƒ๊ด€์—†๋Š” ์ด์•ผ๊ธฐ์ธ๋ฐ ๋ฐฑ์ค€์—์„œ ๊ฒฐ๊ณผ ๋’ค์— ํผ์„ผํŠธ๊ฐ€ ์›๋ž˜ ๋œจ๋‚˜์š”??
์ €๋Š” ํ•ญ์ƒ ํผ์„ผํŠธ ์˜ฌ๋ผ๊ฐ€๋‹ค๊ฐ€ ์ตœ์ข…์ ์œผ๋กœ๋Š” ํผ์„ผํŠธ ์—†์ด ๊ฒฐ๊ณผ๋งŒ ๋œจ๋˜๋ฐ ใ…‡..์–ด๋–ป๊ฒŒ ๋ณด๋‚˜์š”..?!

์–ด ์ €๋„ ์ด๊ฑฐ ์ค€์„ฑ๋‹˜ํ•œํ…Œ ๋ฐฐ์› ๋Š”๋ฐ ํฌ๋กฌ์— ์žˆ๋Š” ๋ฐฑ์ค€ ์ต์Šคํ…์…˜ ๊น”์•„์•ผํ•ด์š”!! @pknujsp ํ˜น์‹œ ์ด๋ฆ„์ด ๋ญ์˜€์ฌฌ...?

baekjoonhub ์“ฐ์‹œ๋ฉด ๋ฉ๋‹ˆ๋‹ค.

๊ฐ์‚ฌํ•ฉ๋‹ˆ๋‹ค.. (_ _) ๋งจ๋‚  ํผ์„ผํŠธ ์˜ฌ๋ผ๊ฐ€๋Š”๊ฑฐ ์ณ๋‹ค๋ณด๊ณ  ์žˆ์—ˆ๋Š”๋ฐ ๋”ฐ๋กœ ์žˆ์—ˆ๊ตฐ์š” .. ๐Ÿ˜…
๋ฐ”๋กœ ๋””์ฝ”์— ๊ฟ€ํŒ ๊ณต์œ ๊ฐ‘๋‹ˆ๋‹ค

@tgyuuAn tgyuuAn merged commit 229f372 into main May 3, 2024
@tgyuuAn tgyuuAn deleted the 49-tgyuuAn branch May 3, 2024 15:36
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