Category
algorithm
Detonate The Maximum Bombs
The task involves determining the maximum number of bombs that can be detonated by choosing to detonate only one bomb. Bomb triggers a chain reaction when detonated, potentially setting off more bombs within its range. 
First Missing Positive
The problem requires finding the smallest positive integer that doesn't appear in an unsorted array 
Binary Indexed Tree (Fenwick Tree)
A Fenwick tree or binary indexed tree (BIT) is a data structure that can efficiently update elements and calculate prefix sums in a table of numbers 
Collection of bit mask operation
I have collected a few popular and useful bit operations 
Modular Inverse
In arithmetic, a modular multiplicative inverse of an integer a is an integer x such that the product a*x = 1 with respect to the modulus m