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