How will i get to n=know that i have entered a new level?

#1

in the first approach discussed, in which pairs are inserted in the queue, how will get to know the level number ???

#2

hey @sirraghavgupta, you need to maintain the a variable (let say count). This variable count is initialised with value 0, Now when you push first entry, it will (root,count) . Whenever you pop the a entry from queue, you need to increase the value of count by 1.

Hence count will represent level no.

#3

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