You are given a matrix ‘ARR’ having dimensions ‘N*M’. Your task to find the rank of the matrix ‘ARR’.

The rank of a matrix is defined as:

Given an undirected graph, find how many triangles it can have where a triangle is a cyclic path of length three which begins and end at the same vertex.

#### An undirected graph is a graph in which if you can go from a vertex, sa...