Problem:
Score : 100 points

Problem Statement

Given an integer a as input, print the value a + a^2 + a^3.

Constraints

1 \leq a \leq 10

a is an integer.

Input

Input is given from Standard Input in the following format:

a

Output

Print the value a + a^2 + a^3 as an integer.

Sample Input 1

2

Sample Output 1

14

When a = 2, we have a + a^2 + a^3 = 2 + 2^2 + 2^3 = 2 + 4 + 8 = 14.

Print the answer as an input. Outputs such as 14.0 will be judged as incorrect.

Sample Input 2

10

Sample Output 2

1110

Solution in C# (Mono-csc 3.5.0) (judge verdict: Wrong Answer)

using System;
using System.Linq;

namespace ABC172
{
    class D
    {
        static void Main(string[] args)
        {
            var N = long.Parse(Console.ReadLine());
            var Count = new long[N + 10].Select(x => x = 1).ToArray();

            for (int i = 2; i <= N; i++)
            {
                var index = 1;
                while (i * index <= N)
                {
                    Count[i * index]++;
                    index++;
                }
            }

            var sum = 0L;
            for (int i = 1; i <= N; i++)
            {
                sum += Count[i] * i;
            }

            //Console.WriteLine(string.Join(" ", Count));
            Console.WriteLine(sum);
        }
    }
}