shapeArea.cpp

/*Below we will define an n-interesting polygon. Your task is to find the area of a polygon for a given n.

A 1-interesting polygon is just a square with a side of length 1. An n-interesting polygon is obtained by taking the n - 1-interesting polygon and appending 1-interesting polygons to its rim, side by side. You can see the 1-, 2-, 3- and 4-interesting polygons in the picture below.

Example

•For n = 2, the output should be
shapeArea(n) = 5;
•For n = 3, the output should be
shapeArea(n) = 13.
*/

int shapeArea(int n) 
{
    int sum = 1;
    for(int i = 2; i<=n; i++)
        sum+=4*(i-1);
    return sum;
}

//
//  Created by Muhamed Karajic on February 5, 2018.
//  Copyright © 2018 Muhamed Karajic. All rights reserved.
//