Kind of ugly, but it would work. When the guess is small, you use a
NASA announces major overhaul of Artemis moon program amid safety concerns, delays: "We've got to get back to basics"，详情可参考同城约会
We even tried building hierarchies with 2-3 levels, but the number of shortcuts grew too fast for higher levels if we generated a full graph inside each cluster.，详情可参考51吃瓜
But how many fish will actually be saved for this money?