I attended Amazon placement test today . There was a question where i
got confused.It is as follows.

Give an algorithm to connect all nodes in one level of a binary tree .

               5
5
            /
\                                               /      \
         8           2          -------->                      8 ----
>  2
      /     \      /                                           /
\      /
     1     2     6                                        1 ---> 2 -->6

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