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.
Probably this will be even simpler:
select N, case when P is NULL then 'Root'
when N in (select P from BST) then 'Inner'
else 'Leaf' end as Node
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 →
Probably this will be even simpler: select N, case when P is NULL then 'Root' when N in (select P from BST) then 'Inner' else 'Leaf' end as Node from BST order by N;