We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
select N,
case when P is null then 'Root'
when N not in (select P from BST where P is not null) then 'Leaf'
else 'Inner' end as Type
from BST
order by N;
Cookie support is required to access HackerRank
Seems like cookies are disabled on this browser, please enable them to open this website
Binary Tree Nodes
You are viewing a single comment's thread. Return to all comments →
MySQL / PostgreSQL
select N, case when P is null then 'Root' when N not in (select P from BST where P is not null) then 'Leaf' else 'Inner' end as Type from BST order by N;