inf = 99999999 graph = [ [0, 7, 5], [7, 0, inf], [5, inf, 0]] print(graph)
graph = [[] for _ in range(3)] print(graph) graph[0].append((1, 7)) graph[0].append((2, 5)) graph[1].append((0, 7)) graph[2].append((0, 5)) print(graph)