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An implementation of a queue Q, using two stacks S1and S2, is given below:

 

The number Push and Pop operation needed is represented by X and Y, then the value of X + Y for following operation are ________.

 

in DS edited by
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Add this :

 

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17 ..

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This should be the best answer!
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syncronizing Thank you :p  I did not make it make it an answer because it was looking dull(the pic quality) hehe :p

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Now Simply add total PUSH and POP operation.
PUSH = 9
POP = 8
hence, 17 is the answer.

Answer by @MiNiPanda

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Sorry for Alignment issue :P
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