nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqwahdrf28uf5n5tykfeyzf43sdgg65djvm8re3ulpentr3teaxujs9vt3h7 nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqyycnzg2zptpares8xj3lnvc2vgxz792l69kul20udg3he9upuzkqkwacrj except humans can't invert binary trees