g = {
"a": ["d", "f"],
"b": ["c", "b"],
"c": ["b", "c", "d", "e"],
"d": ["a", "c"],
"e": ["c"],
"f": ["a"]
}
complete_graph = {"a": ["b", "c"], "b": ["a", "c"], "c": ["a", "b"]}
isolated_graph = {"a": [], "b": [], "c": []}
graph = Graph(g)
print(graph.density())
graph = Graph(complete_graph)
print(graph.density())
graph = Graph(isolated_graph)
print(graph.density())
print('#############################################')
g = {
"a": ["d"],
"b": ["c"],
"c": ["b", "c", "d", "e"],
"d": ["a", "c"],
"e": ["c"],
