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# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;

namespace CS_Competit
{
  class Program
  {
    private float pointer = 0;
    static void Main(string[] args)
    {
      float a = float.Parse(Console.ReadLine());
      Program program = new Program();
      program.Calc(a, 3);
      Console.WriteLine(program.Pointer);
    }

    public float Calc(float num, int exp)
    {
      if (exp == 0)
      {
        pointer = 0;
        return 1;
      }

      float result = num * Calc(num, exp - 1);
      pointer += result;
      return result;
    }

    public float Pointer
    {
      get { return pointer; }
    }
  }
}