n, m, r = map(int, input().split()) INF = int(1e9) item = [0] + list(map(int, input().split())) graph = [[0 if i == j else INF for i in range(n + 1)] for j in range(n + 1)] for _ in range(r): a, b, c = map(int, input().split()) graph[a][b] = graph[b][a] = c for k in range(1, n + 1): for a in range(1, n + 1): for b in range(1, n + 1): graph[a][b] = graph[b][a] = min(graph[a][b], graph[a][k] + gra..