Bears and Bees

It's a very funny thought that, if Bears were Bees, They'd build their nests at the bottom of trees. And that being so (if the Bees were Bears), We shouldn't have to climb up all these stairs. Winnie-the-Pooh, a Complaining Song Have you ever thought, when given an undirected graph in some problem, that it would be easier to solve it if the graph's edges were actually its vertices and the