Fenwick Tree Made Simple | Master Binary Index Tree (BIT) with Easy Example

Fenwick Tree, also known as Binary Indexed Tree, is a powerful data structure used to efficiently calculate prefix sums and update values in an array. Instead of recalculating sums every time, it stores partial sums in a smart way using binary logic. This allows both update and sum operations to run in O(log n) time, making it very useful in competitive programming and real-time data processing. In this video, you will learn Fenwick Tree in a simple and easy way with examples.