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;
class Example
{
    static void Main()
    {
        while (true)
        {
            string s = Console.ReadLine();
            if (string.IsNullOrEmpty(s)) break;
                int num = int.Parse(s);
            int counter = 0;
            for (int a = 0; a <= 9; a++)
            {
                for (int b = 0; b <= 9; b++)
                {
                    for (int c = 0; c <= 9; c++)
                    {
                        for (int d = 0; d <= 9; d++)
                        {
                            if (a + b + c + d == num)
                                counter++;
                        }
                    }
                }
            }
            Console.WriteLine(counter);
        }
    }
}