using System;

public class Program

{

    public static void Main()

    {

        int total = 100;

int count = 0;

​

for (int i = 0; i <= total / 2; i++)

{

for (int j = 0; j <= total / 5; j++)

{

for (int k = 0; k <= total / 20; k++)

{

for (int l = 0; l <= total / 50; l++)

{

if (i * 2 + j * 5 + k * 20 + l * 50 == total)

{

count++;

}

}

}

}

}

​

Console.WriteLine( count);

    }

}