https://leetcode.com/problems/copy-list-with-random-pointer/\nhttps://leetcode.com/problems/making-a-large-island/\n\nI can do the island algorithms in my sleep, but the wrinkle in this one completely threw me off (hadn\'t seen it before, found the problem on LC after the interview).  I immediately suggested a backtracking solution but the interviewer said it would be too expensive. Couldn\'t get it done. I\'m sure I\'ll be rejected.

https://leetcode.com/problems/copy-list-with-random-pointer/\nhttps://leetcode.com/problems/making-a-large-island/\n\nI can do the island algorithms in my sleep