Практику 5(III) 8

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace mainSolution
{




    static class Program
    {

        static int autoSum(int n)
        {

            return ((n + n * n) / 2);
        }

        static void Main(string[] args)
        {
            int m = Int32.Parse(Console.ReadLine());
            int k = Int32.Parse(Console.ReadLine());
            Console.WriteLine(autoSum(m) + autoSum(2 * k));
        }

    }
}