Goku's Tree

Recently Goku has discovered a rooted tree graph. Goku’s tree has N nodes, among them node 1 is the...

Expected Result

A witch has imprisoned Bob in the 1st room of the Central Witchland Hotel. The hotel is weird. All t...

Building the Number

This is a straight-froward problem. You will be given N. You have to find the expected value of bui...