using System;
public class Program
{
public static void Main()
Console.WriteLine("Enter k =");
int k = int.Parse(Console.ReadLine());
Console.WriteLine("Enter n =");
int n = int.Parse(Console.ReadLine());
int t = 1;
for (int i =0; i <=k ;i++)
t *= n -i*k;
}
Console.WriteLine("t =" + t);