Console.WriteLine("Task: I_1");

static int C(uint n, uint k)
{
    int[] factorial = new int[n + 1];
    factorial[0] = 1;
    for (int i = 1; i <= n; i++)
    {
        factorial[i] = i * factorial[i - 1];
    }
    return factorial[n] / (factorial[k] * factorial[n - k]);
}

static int solve(uint candidates)
{
    return C(candidates, 5);
}

Console.WriteLine("Solve for 8: {0}", solve(8));
Console.WriteLine("Solve for 10: {0}", solve(10));
Console.WriteLine("Solve for 11: {0}", solve(11));