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6-H0ngJu #164

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Mar 27, 2024
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6-H0ngJu #164

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d1971b6
2024-03-19
H0ngJu Mar 19, 2024
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Merge branch 'main' into 6-H0ngJu
H0ngJu Mar 27, 2024
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1 change: 1 addition & 0 deletions H0ngJu/README.md
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Expand Up @@ -7,5 +7,6 @@
| 3μ°¨μ‹œ | 2024.03.10 | νž™ | [N번째 큰 수](https://www.acmicpc.net/problem/2075) | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/156 |
| 4μ°¨μ‹œ | 2024.03.13 | νž™ | [λ¬Έμ œμ§‘](https://www.acmicpc.net/problem/1766) | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/158 |
| 5μ°¨μ‹œ | 2024.03.16 | κ΅¬ν˜„ | [μš”μ„Έν‘ΈμŠ€ 문제](https://www.acmicpc.net/problem/1158) | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/161 |
| 6μ°¨μ‹œ | 2024.03.19 | μŠ€νƒ | [였큰수](https://www.acmicpc.net/problem/17298) | https://github.com/AlgoLeadMe/AlgoLeadMe-1/pull/164 |

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25 changes: 25 additions & 0 deletions H0ngJu/였큰수.py
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import sys
from collections import *

def input(): return sys.stdin.readline().strip()
N = int(input())

arr = list(map(int, input().split()))
arr.reverse()
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@pknujsp pknujsp Mar 20, 2024 •
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arr을 λ’€μ§‘κ±°λ‚˜ pop()ν•΄μ„œ μ§€μš°λŠ” μ‹μœΌλ‘œ arr을 크게 κ±΄λ“œλ¦¬μ§€ μ•Šμ•„λ„ λΌμš”

stackμ—μ„œ μ›μ†Œλ₯Ό κΊΌλ‚΄μ„œ answer에 였큰수λ₯Ό λ„£μ–΄μ£ΌλŠ” μƒν™©μ—μ„œλŠ”,
μŠ€νƒμ— 있던 μ›μ†Œμ˜ μΈλ±μŠ€κ°€ ν˜„μž¬ μˆœνšŒμ€‘μΈ arr의 μ›μ†Œ μΈλ±μŠ€λ³΄λ‹€ 항상 μ•žμ— μžˆμ–΄μš”

κ·Έλž˜μ„œ arr을 κ±΄λ“œλ¦¬μ§€ μ•Šκ³ , μˆœμ„œλŒ€λ‘œ μˆœνšŒν•˜λ©΄μ„œ 인덱슀만 μŠ€νƒμ— λ„£μ–΄μ£Όλ©΄μ„œ μ§„ν–‰ν•˜λ©΄ λΌμš”

  1. arr을 μˆœμ„œλŒ€λ‘œ μˆœνšŒν•©λ‹ˆλ‹€
  2. ν˜„μž¬ μ›μ†Œκ°€ μŠ€νƒμ— μžˆλŠ” μ›μ†Œλ³΄λ‹€ 크면, κ·Έ μ›μ†Œμ˜ 였큰수둜 μ„€μ •ν•΄μ€λ‹ˆλ‹€
  3. μŠ€νƒμ΄ λΉ„κ±°λ‚˜ ν˜„μž¬ μ›μ†Œλ³΄λ‹€ 큰 μ›μ†Œλ₯Ό λ§Œλ‚  λ•ŒκΉŒμ§€ 이걸 κ³„μ†ν•©λ‹ˆλ‹€
  4. ν˜„μž¬ μ›μ†Œμ˜ 인덱슀λ₯Ό μŠ€νƒμ— λ„£μŠ΅λ‹ˆλ‹€

μ΄λ ‡κ²Œ ν•˜λ©΄, arr을 λ”°λ‘œ κ±΄λ“œλ¦¬μ§€ μ•Šκ³ , ν•œ 번만 봐도 λͺ¨λ“  였큰수λ₯Ό 찾을 수 μžˆμ–΄μš”
λ©”λͺ¨λ¦¬λ„ λ”°λ‘œ νŠœν”Œμ„ μƒμ„±ν•˜λ©΄μ„œ μ§„ν–‰ν•˜μ§€ μ•ŠμœΌλ‹ˆ 많이 μ€„μ–΄λ“€μ–΄μš”

N = int(input())
A = list(map(int, input().split()))

stack = deque()
result = [-1] * N

for i in range(N):
    while stack and A[stack[-1]] < A[i]:
        result[stack.pop()] = A[i]
        
    stack.append(i)

print(*result)

answer = [-1 for _ in range(N)]

id = 0

stack = []
stack.append((id,arr.pop()))

while arr:
id += 1
arr_data = arr.pop()
while stack and stack[-1][1] < arr_data:
index, data = stack.pop()
answer[index] = arr_data
stack.append((id, arr_data))

for i in answer:
print(i, end=" ")