use gryf::{domain::Graph, storage::AdjMatrix};
fn main() {
let mut graph = Graph::new_undirected_in(AdjMatrix::default());
let u = graph.add_vertex("u");
let v = graph.add_vertex("v");
let w = graph.add_vertex("w");
graph.add_edge(u, v, 1);
graph.add_edge(v, w, 2);
graph.add_edge(w, u, 3);
}