Dividing into Regions

ChefLand develops very fast. Recently, there were a few new cities built, so the total number of cities in ChefLand have become N. In order to communicate, the cities are connected with N-1 bidirectional roads in such a way that there is exactly one way to get from one city to another. In other words, the graph with cities as nodes and roads as edges is a tree. Now, the King of ChefLand thinks