public static void Main()
Console.WriteLine("Hello World");
bool found = getClusterPermuation(arr, n, m, 1);
static bool getClusterPermuation(int[] arr, int n, int m, int index)
for (int i = 0; i < m; i++)
Console.Write("{0} ", arr[i]);
for (int i = 3; i <= n; i++)
found = getClusterPermuation(arr, n, m, index + 1);