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[Python/ํŒŒ์ด์ฌ] ๋ฐฑ์ค€ 5014๋ฒˆ: ์Šคํƒ€ํŠธ๋งํฌ
๐Ÿ”์•Œ๊ณ ๋ฆฌ์ฆ˜/๋ฐฑ์ค€

[Python/ํŒŒ์ด์ฌ] ๋ฐฑ์ค€ 5014๋ฒˆ: ์Šคํƒ€ํŠธ๋งํฌ

2021. 12. 23. 14:36
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๋ฌธ์ œ

ํ’€์ด

์ „ํ˜•์ ์ธ ๋„ˆ๋น„์šฐ์„  ํƒ์ƒ‰ ๋ฌธ์ œ, heap์„ ์ด์šฉํ•ด ํ’€์–ด๋ณด์•˜๋‹ค.

 

์ฝ”๋“œ

from sys import stdin
import heapq
input = stdin.readline

f, s, g, u, d = map(int, input().split())

visited = [False] * (f + 1)
q = [(0, s)]
visited[s] = True
ans = "use the stairs"
while q:
      cnt, now = heapq.heappop(q)
      if now == g:
            ans = cnt
            break
      if now - d > 0:
            if not visited[now - d]:
                  visited[now - d] = True
                  heapq.heappush(q, (cnt + 1, now - d))
      if now + u <= f:
            if not visited[now + u]:
                  visited[now + u] = True
                  heapq.heappush(q, (cnt + 1, now + u))

print(ans)

 

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