Problem:
Sum of 4 Integers

Write a program which reads an integer n and identifies the number of combinations of a, b, c and d (0 ≤ a, b, c, d ≤ 9) which meet the following equality:

a + b + c + d = n

For example, for n = 35, we have 4 different combinations of (a, b, c, d): (8, 9, 9, 9), (9, 8, 9, 9), (9, 9, 8, 9), and (9, 9, 9, 8).

Input

The input consists of several datasets. Each dataset consists of n (1 ≤ n ≤ 50) in a line. The number of datasets is less than or equal to 50.

Output

Print the number of combination in a line.

Sample Input

35
1

Output for the Sample Input

4
4

Solution in C# (judge verdict: Accepted)

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

namespace ConsoleApp10
{
    class Program
    {
        static void Main(string[] args)
        {
            Calc calc = new Calc();
            string str;
            int n;
            List<int> combo = new List<int>();

            while ((str = Console.ReadLine()) != null)
            {
                int count;
                n = int.Parse(str);
                if (n > 36)
                {
                    count = 0;
                }
                else if (n <= 18)
                {
                    count = calc.Combo(n);
                }
                else
                {
                    n = 36 - n;
                    count = calc.Combo(n);
                }
                combo.Add(count);
            }

            foreach (int item in combo)
            {
                Console.WriteLine(item);
            }
        }
    }

    class Calc
    {
        int count;

        internal int Combo(int n)
        {
            count = 0;
            for (int a = 0; a < 10; a++)
            {
                for (int b = 0; b < 10; b++)
                {
                    for (int c = 0; c < 10; c++)
                    {
                        int sum = a + b + c;
                        if (n - sum < 10 && n - sum >= 0)
                        {
                            count++;
                        }
                    }
                }
            }
            return count;
        }

    }
}