salesforce

https://www.1point3acres.com/bbs/forum.php?mod=viewthread&tid=453356

Is possible

public static void main(String[] ss) {

        System.out.println(isPossible(1,4,5, 14));
    }

    static boolean isPossible(int a, int b, int c, int d) {
        if (a == c && b == d) return true;
        if (a + b > c && a + b > d) return false;
        return isPossible(a + b, b, c, d) || isPossible(a, b + a, c, d);
    }

remove dup nodes

static Node removeDup(Node root) {
        Set<Integer> set = new HashSet<>();
        Node pre = null, rt = root;

        while (root != null) {
            if (set.contains(root.val)) {
                pre.next = root.next;
            }else {
                set.add(root.val);
                pre = root;
            }

            root = root.next;
        }

        return rt;
    }

https://www.1point3acres.com/bbs/forum.php?mod=viewthread&tid=455584&extra=page%3D2%26filter%3Dsortid%26sortid%3D311%26searchoption%5B3046%5D%5Bvalue%5D%3D17%26searchoption%5B3046%5D%5Btype%5D%3Dradio%26sortid%3D311%26orderby%3Ddateline

https://www.1point3acres.com/bbs/forum.php?mod=viewthread&tid=453482&extra=page%3D2%26filter%3Dsortid%26sortid%3D311%26searchoption%5B3046%5D%5Bvalue%5D%3D17%26searchoption%5B3046%5D%5Btype%5D%3Dradio%26sortid%3D311%26orderby%3Ddateline