public static int[] Convert(int n, int duplicate, int duplicates)
{
duplicate = Math.Max(1, Math.Min(n, duplicate));
int[] arr = new int[n + 1];
for (int i = 0; i < arr.Length - 1; i++)
{
arr[i] = i + 1;
}
arr[n] = duplicate;
return(Helfer.ArrayShuffle(arr));
}