SOLUTION INFO
Python · main.py
import sys
import heapq
def input():
return sys.stdin.readline().rstrip()
INF = 99999999
def dijkstra(start, dependency):
pq = [[0,start]]
result = [INF for _ in range(n+1)]
result[start] = 0
while pq:
cur_time, cur = heapq.heappop(pq)
for next_com, next_time in dependency[cur].items():
time = cur_time + next_time
if result[next_com] > time:
result[next_com] = time
heapq.heappush(pq, [time, next_com])
return result
for testcase in range(int(input())):
n, d, c = map(int,input().split())
dependency = {i:{} for i in range(1,n+1)}
for _ in range(d):
a, b, s = map(int,input().split())
dependency[b][a] = s
result = dijkstra(c, dependency)
result = [value for value in result if value != INF]
print(len(result), max(result))
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