L11 : Subtree Sum query with point update using Segment tree or BIT | Queries On Tree | CodeNCode

This is 10th lecture of course "Queries On Tree" and in this lecture we will learn how to answer Subtree Sum queries with point update using Segment tree or BIT. Complete Playlist : https://www.youtube.com/playlist?list=PL5DyztRVgtRVQsDZIJKYLYOj9uX9yluNJ