Implementation of Sliding Window Algorithm in C

public class SlidingWindow
{
    public static int[] MaxSlidingWindow(int[] input, int k)
    {
        int[] result = new int[input.Length - k + 1];
        for (int i = 0; i <= input.Length - k; i++)
        {
            var max = input[i];
            for (int j = 1; j < k; j++)
            {
                if (input[i + j] > max) max = input[i + j];
            }
            result[i] = max;
        }
        return result;
    }

    public static int[] MinSlidingWindow(int[] input, int k)
    {
        int[] result = new int[input.Length - k + 1];
        for (int i = 0; i <= input.Length - k; i++)
        {
            var min = input[i];
            for (int j = 1; j < k; j++)
            {
                if (input[i + j] < min) min = input[i + j];
            }
            result[i] = min;
        }
        return result;
    }

    public static int[] MainMax(int[] input, int n)
    {
        return MaxSlidingWindow(input, n);
    }

    public static int[] MainMin(int[] input, int n)
    {
        return MinSlidingWindow(input, n);
    }
}