static int MinDistance(int[] arr, int n)
        {
            int dmin = int.MaxValue; // Representing infinity
            for (int i = 0; i <= n - 1; i++)
            {
                for (int j = 0; j <= n - 1; j++)
                {
                    if ((i != j) && (Math.Abs(arr[i] - arr[j]) < dmin))
                    {
                        dmin = Math.Abs(arr[i] - arr[j]);
                    }
                }
            }
            return dmin;
        }

        static int MinDistance2(int[] arr, int n)
        {
            int dmin = int.MaxValue; // Representing infinity
            int temp = 0;
            for (int i = 0; i <= n-2; i++)
            {
                for (int j = i+1; j <= n-1; j++)
                {
                    temp = Math.Abs(arr[i] - arr[j]);
                    if (temp < dmin){
                        dmin = temp;
                    }
                }
            }
            return dmin;
        }