Onsite interview round 1:\nSimilar to this : https://leetcode.com/discuss/interview-question/1693416/google-onsite-recursively-delete-leave-nodes-in-a-multi-tree\nOnsite interview round 2:\nhttps://leetcode.com/problems/find-all-possible-recipes-from-given-supplies/\nOnsite interview round 3: Googleyness\nOnsite interview round 4:\nhttps://leetcode.com/discuss/interview-question/2337984/Google-or-Onsite-or-Song-Shuffler

Onsite interview round 1:\nSimilar to this : https://leetcode.com/discuss/interview-question/1693416/google-onsite-recursively-delete-leave-nodes-in-a-multi-tre