public static void main(String[] args) {
        System.out.println(new MaxIncreaseToKeepSkyline().maxIncreaseKeepingSkyline(
                new int[][] {
                        { 3, 0, 8, 4 },
                        { 2, 4, 5, 7 },
                        { 9, 2, 6, 3 },
                        { 0, 3, 1, 0 }
                }
        ));
    }
Why Did you create this class? what does it do?
src/problems/medium/MaxIncreaseToKeepSkyline.java