#!/usr/bin/env python3
import sys
input_lines = [line for line in sys.stdin]
connections = []
for line in input_lines:
divided = "".join(line.split()).split(":")
value = divided[1]
nodes = divided[0].split("-")
connections.append([nodes[0], nodes[1], value])
from src.Graph import Graph
g = Graph(
set([row[0]
for row in connections]).union(set([row[1] for row in connections])))
g.add_not_oriented_valued_connections(connections)
bridges = g.bridges()
for bridge in bridges:
print(str(bridge.begg) + " - " + str(bridge.to))
separating_set = g.separating_set()
for node in separating_set:
print(node)
class GraphTest(unittest.TestCase):
def setUp(self):
self.g = Graph(["A", "B", "C", "D", "E", "F"])
def test_get_node(self):
self.assertEqual(self.g.get_node("A").name, "A")
self.assertEqual(self.g.get_node("A").name, "A")
self.assertEqual(self.g.get_node("B").name, "B")
self.assertIsNone(self.g.get_node("Z"))
def test_add_node(self):
self.assertTrue(self.g.has_node("A"))
self.assertFalse(self.g.has_node("Z"))
def test_has_node(self):
self.assertTrue(self.g.has_node("A"))
self.assertTrue(self.g.has_node(Node("A").name))
def test_add_not_oriented_connection(self):
self.g.add_not_oriented_connection(Node("A"), Node("B"))
self.assertTrue(self.g.is_connection("A", "B"))
self.assertTrue(self.g.is_connection("B", "A"))
self.assertFalse(self.g.is_connection("A", "C"))
with self.assertRaises(ValueError):
self.g.add_not_oriented_connection(Node("A"), Node("Z"))
def test_add_oriented_connection(self):
self.assertFalse(self.g.is_connection("A", "B"))
self.g.add_oriented_connection("A", "B")
self.assertTrue(self.g.is_connection("A", "B"))
self.assertFalse(self.g.is_connection("D", "E"))
self.g.add_oriented_connection("D", "E")
self.assertTrue(self.g.is_connection("D", "E"))
def test_add_oriented_connections(self):
self.g.add_oriented_connections([["A", "B"], ["C", "B"], ["F", "E"]])
self.assertFalse(self.g.is_connection("B", "C"))
self.assertTrue(self.g.is_connection("C", "B"))
self.assertFalse(self.g.is_connection("C", "E"))
self.assertTrue(self.g.is_connection("F", "E"))
def test_add_not_oriented_connections(self):
self.g.add_not_oriented_connections([[Node("A"), Node("B")],
[Node("B"), Node("C")],
[Node("D"), Node("E")]])
self.assertTrue(self.g.is_connection("B", "C"))
self.assertTrue(self.g.is_connection("C", "B"))
self.assertFalse(self.g.is_connection("C", "E"))
def test_remove_node(self):
self.g.add_not_oriented_connections([[Node("A"), Node("B")],
[Node("B"), Node("C")],
[Node("D"), Node("E")]])
self.g.remove_node(Node("B"))
self.assertEqual(5, len(self.g.nodes))
self.assertEqual(1, len(self.g.connections))
def test_get_leaving_edges_size(self):
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["D", "E"]])
self.assertEqual(1, self.g.get_leaving_edges_size(Node("A")))
self.assertEqual(2, self.g.get_leaving_edges_size(Node("B")))
self.assertEqual(1, self.g.get_leaving_edges_size(Node("C")))
self.assertEqual(0, self.g.get_leaving_edges_size(Node("F")))
self.g.add_oriented_connections([["C", "A"]])
self.assertEqual(1, self.g.get_leaving_edges_size(Node("A")))
self.assertEqual(2, self.g.get_leaving_edges_size(Node("B")))
self.assertEqual(2, self.g.get_leaving_edges_size(Node("C")))
self.assertEqual(0, self.g.get_leaving_edges_size(Node("F")))
def test_get_degree(self):
self.g.add_oriented_connections([["A", "B"], ["B", "C"], ["D", "E"]])
self.assertEqual(1, self.g.get_degree(Node("A")))
self.assertEqual(2, self.g.get_degree(Node("B")))
self.assertEqual(1, self.g.get_degree(Node("C")))
self.assertEqual(1, self.g.get_degree(Node("D")))
self.assertEqual(0, self.g.get_degree(Node("F")))
def test_get_node_with_highest_degree(self):
self.g.add_oriented_connections([["A", "B"], ["B", "C"], ["F", "E"]])
self.assertEqual(Node("B"), self.g.get_node_with_highest_degree())
self.g.add_oriented_connections([["B", "A"], ["D", "E"]])
self.assertEqual(Node("B"), self.g.get_node_with_highest_degree())
self.g.add_oriented_connections([["D", "A"], ["A", "E"]])
self.assertEqual(Node("A"), self.g.get_node_with_highest_degree())
def test_is_oriented(self):
self.assertFalse(self.g.is_oriented())
self.g.add_not_oriented_connections([["D", "B"]])
self.assertFalse(self.g.is_oriented())
self.g.add_oriented_connections([["A", "B"]])
self.assertTrue(self.g.is_oriented())
self.g.add_oriented_connections([["D", "A"], ["A", "E"]])
self.assertTrue(self.g.is_oriented())
def test_is_multigraph(self):
self.assertFalse(self.g.is_multigraph())
self.g.add_oriented_connections([["A", "B"], ["B", "C"], ["F", "E"]])
self.assertFalse(self.g.is_multigraph())
self.g.add_oriented_connections([["A", "B"]])
self.assertTrue(self.g.is_multigraph())
def test_is_tree(self):
self.assertFalse(self.g.is_tree())
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["B", "D"]])
self.assertFalse(self.g.is_tree())
self.g.add_not_oriented_connections([["D", "E"], ["E", "F"]])
self.assertTrue(self.g.is_tree())
self.g.add_not_oriented_connections([["A", "F"]])
self.assertFalse(self.g.is_tree())
def test_is_connected(self):
self.assertFalse(self.g.is_connected())
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["B", "D"]])
self.assertFalse(self.g.is_connected())
self.g.add_not_oriented_connections([["D", "E"], ["E", "F"]])
self.assertTrue(self.g.is_connected())
self.g.add_not_oriented_connections([["A", "F"]])
self.assertTrue(self.g.is_connected())
def test_has_loop(self):
self.assertFalse(self.g.has_loop())
self.g.add_oriented_connections([["A", "B"], ["B", "C"], ["F", "E"]])
self.assertFalse(self.g.has_loop())
self.g.add_oriented_connections([["A", "A"]])
self.assertTrue(self.g.has_loop())
def test_has_connectivity(self):
self.assertFalse(self.g.has_connectivity())
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["F", "E"]])
self.assertFalse(self.g.has_connectivity())
self.g.add_not_oriented_connections([["A", "D"], ["C", "E"]])
self.assertTrue(self.g.has_connectivity())
def test_reachable_nodes(self):
self.assertEqual(1, len(self.g.reachable_nodes(Node("A"))))
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["D", "E"]])
self.assertEqual(3, len(self.g.reachable_nodes(Node("A"))))
self.assertEqual(2, len(self.g.reachable_nodes(Node("D"))))
self.assertEqual(1, len(self.g.reachable_nodes(Node("F"))))
def test_get_neighbors(self):
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["D", "E"]])
self.assertEqual({Node("B")}, self.g.get_neighbors(Node("A")))
self.assertEqual({Node("A"), Node("C")},
self.g.get_neighbors(Node("B")))
self.assertEqual({Node("D")}, self.g.get_neighbors(Node("E")))
def test_is_complete(self):
self.assertFalse(self.g.is_complete())
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["D", "E"]])
self.assertFalse(self.g.is_complete())
import itertools
for conn in itertools.product(["A", "B", "C", "D", "E", "F"],
repeat=2):
self.g.add_not_oriented_connection(conn[0], conn[1])
self.assertTrue(self.g.is_complete())
def test_has_bidirectional_edge(self):
self.assertFalse(self.g.has_bidirectional_edge())
self.g.add_oriented_connections([["A", "B"], ["B", "C"], ["D", "E"]])
self.assertFalse(self.g.has_bidirectional_edge())
self.g.add_oriented_connections([["B", "A"]])
self.assertTrue(self.g.has_bidirectional_edge())
def test_is_bidirectional(self):
self.g.add_oriented_connections([["A", "B"], ["B", "A"], ["B", "C"],
["D", "E"]])
self.assertFalse(self.g.is_bidirectional())
self.g.add_oriented_connections([["C", "B"], ["E", "D"]])
self.assertTrue(self.g.is_bidirectional())
def test_total_cost(self):
self.assertEqual(0, self.g.total_cost())
self.g.add_not_oriented_valued_connections([["A", "B",
1], ["B", "C", 5],
["B", "D", 4]])
self.assertEqual(10, self.g.total_cost())
self.g.add_not_oriented_valued_connections([["D", "E", 3],
["E", "F", 2]])
self.assertEqual(15, self.g.total_cost())
def test_get_minimal_spanning_tree(self):
self.g.add_not_oriented_valued_connections([["A", "B",
1], ["B", "C", 2],
["B", "D",
1], ["D", "E", 4],
["E", "F", 2],
["A", "F", 10],
["A", "C", 7]])
h = self.g.get_minimal_spanning_tree(printing=False)
self.assertEqual(5, len(h.connections))
self.assertEqual(10, h.total_cost())
def test_present_in_components(self):
f = Graph({"A", "B"})
f.add_not_oriented_connections([["A", "B"]])
s = Graph({"C"})
t = Graph({"D", "E", "F"})
t.add_not_oriented_connections([["D", "E"], ["E", "F"]])
self.assertTrue(self.g.present_in_components(f.get_node("A"), {f, s}))
self.assertTrue(
self.g.present_in_components(t.get_node("F"), {f, s, t}))
self.assertFalse(self.g.present_in_components(t.get_node("F"), {f, s}))
self.assertFalse(self.g.present_in_components(f.get_node("B"), {s, t}))
self.assertFalse(self.g.present_in_components(f.get_node("B"), {t}))
self.assertTrue(f.present_in_components(f.get_node("A"), {f}))
def test_components(self):
self.assertEqual(len(self.g.nodes), len(self.g.components()))
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"]])
self.assertEqual(len(self.g.nodes) - 2, len(self.g.components()))
def test_is_bridge(self):
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["C", "D"], ["A", "C"]])
self.assertFalse(self.g.is_bridge(Connection("A", "B", False)))
self.assertTrue(self.g.is_bridge(Connection("C", "D", False)))
def test_bridges(self):
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["C", "D"], ["A", "C"]])
self.assertEqual([Connection("C", "D", False)], self.g.bridges())
def test_separating_set(self):
self.g.add_not_oriented_connections([["A", "B"], ["B",
"C"], ["C", "D"],
["A", "C"], ["C", "E"]])
self.assertEqual({Node("C"), Node("F")}, self.g.separating_set())
def test_build_avl_tree(self):
self.g = Graph(set())
# self.g.build_avl_tree([5,15,10])
# self.assertEqual(2,len(self.g.connections))
# self.assertTrue(self.g.is_connection(5,10))
# self.assertTrue(self.g.is_connection(10,15))
def test_get_incoming_degree(self):
self.assertEqual(self.g.get_incoming_degree("A"), 0)
self.g.add_oriented_connections([["A", "B"]])
self.assertEqual(self.g.get_incoming_degree("A"), 0)
self.assertEqual(self.g.get_incoming_degree("B"), 1)
self.g.add_not_oriented_connections([["B", "C"]])
self.assertEqual(self.g.get_incoming_degree("B"), 2)
self.assertEqual(self.g.get_incoming_degree("C"), 1)
def test_all_nodes_have_equal_in_out_degree(self):
self.assertTrue(self.g.all_nodes_have_equal_in_out_degree())
self.g.add_oriented_connections([["A", "B"], ["B", "C"], ["C", "D"]])
self.assertFalse(self.g.all_nodes_have_equal_in_out_degree())
self.g.add_oriented_connections([["D", "A"]])
self.assertTrue(self.g.all_nodes_have_equal_in_out_degree())
def test_get_num_of_unique_neigbors(self):
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["D", "E"]])
self.assertEqual(1, self.g.get_num_of_unique_neigbors({Node("A")}))
self.assertEqual(0, self.g.get_num_of_unique_neigbors({Node("F")}))
self.assertEqual(2, self.g.get_num_of_unique_neigbors({Node("B")}))
self.assertEqual(
2, self.g.get_num_of_unique_neigbors({Node("A"),
Node("D")}))
self.assertEqual(
2,
self.g.get_num_of_unique_neigbors(
{Node("A"), Node("B"), Node("D")}))
def test_get_node_with_lowest_value(self):
a = Node("A", "B", 3)
nodes = {a}
self.assertEqual(a, self.g.get_node_with_lowest_value(nodes))
b = Node("B", "C", 2)
nodes.add(b)
self.assertEqual(b, self.g.get_node_with_lowest_value(nodes))
c = Node("C", None, 0)
d = Node("D", None, None)
nodes.add(c)
nodes.add(d)
self.assertEqual(c, self.g.get_node_with_lowest_value(nodes))
def test_get_path_from(self):
self.g = Graph(["A", "B", "C", "D"])
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["D", "C"]])
self.assertEqual(7, len(self.g.get_path_from(Node("A"))))
def test_add_connection_to_every_node(self):
self.g.add_connection_to_every_node(self.g.nodes[0], 0, False)
self.assertEqual(len(self.g.nodes) - 1, len(self.g.connections))
def test_invert_connection_values(self):
self.g.add_not_oriented_valued_connections([["A", "B", 2],
["B", "C", -2],
["C", "D", 0]])
self.g.invert_connection_values()
self.assertEqual(-2, self.g.connections[0].value)
self.assertEqual(2, self.g.connections[1].value)
self.assertEqual(0, self.g.connections[2].value)
def test_get_shortest_path_nodes(self):
self.g.add_not_oriented_valued_connections([["A", "B",
1], ["B", "C", 3],
["C", "D", -2],
["D", "E", 1],
["E", "F", 1],
["A", "F", 10],
["D", "B", -2],
["B", "E", 4]])
nodes = self.g.get_shortest_path_nodes(Node("A"), Node("F"))
self.assertEqual(
[Node("A"), Node("B"),
Node("D"), Node("E"),
Node("F")], nodes)
def test_get_hamilton_path(self):
self.g = Graph(["A", "B", "C", "D"])
connections = [["A", "B", 10], ["A", "C", 3], ["A", "D", 2],
["B", "C", 1], ["B", "D", 5], ["C", "D", 7]]
self.g.add_not_oriented_valued_connections(connections)
self.assertEqual(7, len(self.g.get_hamilton_path()))
def test_get_hamilton_path_nodes(self):
self.g = Graph(["A", "B", "C", "D"])
connections = [["A", "B", 10], ["A", "C", 3], ["A", "D", 2],
["B", "C", 1], ["B", "D", 5], ["C", "D", 7]]
self.g.add_not_oriented_valued_connections(connections)
self.assertEqual(4, len(self.g.get_hamilton_path_nodes()))
self.assertIn(self.g.get_hamilton_path_nodes(),
[[Node("B"), Node("C"),
Node("A"), Node("D")],
[Node("A"), Node("D"),
Node("C"), Node("B")]])
def test_get_hamilton_path_nodes2(self):
self.g = Graph(["A", "B", "C", "D"])
connections = [["A", "B", 1], ["B", "C", 2], ["C", "D", 1],
["D", "A", 3], ["A", "C", 3], ["B", "D", 2]]
self.g.add_not_oriented_valued_connections(connections)
self.assertEqual(4, len(self.g.get_hamilton_path_nodes()))
self.assertIn(self.g.get_hamilton_path_nodes(),
[[Node("A"), Node("B"),
Node("C"), Node("D")],
[Node("A"), Node("B"),
Node("D"), Node("C")],
[Node("C"), Node("D"),
Node("B"), Node("A")],
[Node("D"), Node("C"),
Node("B"), Node("A")],
[Node("A"), Node("D"),
Node("C"), Node("B")],
[Node("B"), Node("C"),
Node("D"), Node("A")]])
def test_get_hamilton_path_distance(self):
self.g = Graph(["A", "B", "C", "D"])
connections = [["A", "B", 10], ["A", "C", 3], ["A", "D", 2],
["B", "C", 1], ["B", "D", 5], ["C", "D", 7]]
self.g.add_not_oriented_valued_connections(connections)
self.assertTrue(14 > self.g.get_hamilton_path_distance())
def test_get_three_node_combinations_without_repetition(self):
self.assertEqual(
20, len(self.g.get_three_node_combinations_without_repetition()))
def test_get_three_nodes_with_most_unique_neigbors(self):
self.g.add_not_oriented_connections([["A", "B"], ["B", "C"],
["D", "E"]])
self.assertTrue(
{Node("B"), Node("D"), Node("F")
} == self.g.get_three_nodes_with_most_unique_neigbors()
or {Node("B"), Node("E"), Node("F")
} == self.g.get_three_nodes_with_most_unique_neigbors())
def test_nodes_as_str(self):
self.assertEqual("A, B, C", self.g.nodes_as_str(['A', "B", "C"]))