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10-4.py
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46 lines (34 loc) · 977 Bytes
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"""
@file 10-4.py
@brief 커리큘럼
@desc 위상 알고리즘
위상 알고리즘을 수행, 더 오랜 시간 걸리는 경우의 시간 값을 저장하는 방식으로 결과 테이블 갱신하여 출력
"""
from collections import deque
import copy
v = int(input())
indegree = [0] * (v + 1)
graph = [[] for i in range(v + 1)]
time = [0] * (v + 1)
for i in range(1, v + 1):
data = list(map(int, input().split()))
time[i] = data[0]
for x in data[1:-1]:
indegree[i] += 1
graph[x].append(i)
def topology_sort():
result = copy.deepcopy(time)
q = deque()
for i in range(1, v + 1):
if indegree[i] == 0:
q.append(i)
while q:
now = q.popleft()
for i in graph[now]:
result[i] = max(result[i], result[now] + time[i])
indegree[i] -= 1
if indegree[i] == 0:
q.append(i)
for i in range(1, v + 1):
print(result[i])
topology_sort()