this may matter if the total number of nodes is small

[Zikun Xu]

determine the usage factor of the trie by calculating the average
percent of non-null children across all the
nodes in the trie

does "all the nodes" includes the most top node?

[xewang]

Post by Zikun Xu
determine the usage factor of the trie by calculating the average
percent of non-null children across all the
nodes in the trie
does "all the nodes" includes the most top node?

yes it does