Given a binary tree, find out whether it contains a duplicate sub-tree of size two or more, or not. You don't need to read input or print anything. Your task is to complete the function dupSub() which ...
Understand what the interviewer is asking for by using test cases and questions about the problem. Established a set (2-3) of test cases to verify their own solution later. Established a set (1-2) of ...
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