1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 import sys input = sys.stdin.readline from collections import deque Vn, En = map(int, input().split()) V = {} upper = 1 lower = 1000000000 for i in range(1, Vn + 1) : V[i] = [] for i in range(En) : v1, v2, c = map(int, input().split()) V[v1].append([v2, c]) V[v2].append([v1, c]) u..