A questão apresentada descreve um problema de roteamento em um grafo ponderado, onde Jeanie, uma carteira, precisa entregar cartas em diferentes cidades de Byteland. O objetivo é encontrar a distância mínima que Jeanie precisa percorrer para entregar todas as cartas.

POREM SOMENTE COMPILA ERRO :

import math import os import sys import itertools

def min_delivery_distance(n, letters, roads): # Construir o grafo (lista de adjacências) graph = [[] for _ in range(n)] for u, v, w in roads: graph[u - 1].append((v - 1, w)) graph[v - 1].append((u - 1, w))

# Função DFS para calcular distâncias
def dfs(start, end, visited, current_dist):
    if start == end:
        return current_dist
    visited[start] = True
    min_dist = float('inf')
    for neighbor, weight in graph[start]:
        if not visited[neighbor]:
            new_dist = dfs(neighbor, end, visited[:], current_dist + weight)
            min_dist = min(min_dist, new_dist)
    return min_dist

# Calcular distâncias entre todas as cidades de entrega
dist = {}
for i in range(len(letters)):
    for j in range(i + 1, len(letters)):
        start = letters[i] - 1
        end = letters[j] - 1
        visited = [False] * n
        distance = dfs(start, end, visited, 0)
        dist[(letters[i], letters[j])] = distance
        dist[(letters[j], letters[i])] = distance

# Gerar todas as permutações e calcular a distância mínima
min_distance = float('inf')
for permutation in itertools.permutations(letters):
    current_distance = 0
    for i in range(len(permutation) - 1):
        current_distance += dist[(permutation[i], permutation[i + 1])]
    min_distance = min(min_distance, current_distance)

return min_distance

if name == 'main': fptr = open(os.environ['OUTPUT_PATH'], 'w')

n, k = map(int, input().rstrip().split())
letters = list(map(int, input().rstrip().split()))
roads = []
for _ in range(n - 1):
    roads.append(list(map(int, input().rstrip().split())))

result = min_delivery_distance(n, letters, roads)

fptr.write(str(result) + '\n')
fptr.close()