**Problem**

Given a table of size n * m, with each cell having a color value from the set {r, g, b}, find the area of the largest triangle that has one side parallel with the y – axis (vertical) and has no two vertices that have the same color value.

**Input**

First line contains the size of the matrix i.e. n * m where n is the number of rows and m is the number of columns.

n lines follow each having a string of size m.

**Output**

A single value for the area of the triangle.

Provide the C Code for the above problem?