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Hack The Stack

Harshad has two stacks X and Y containing x and y number of disks respectively. He wants to transfer all the disks to a single stack A of size x+y. He picks a disk from top of the stack X or Y, provided the stack is not empty, and pushes it on the top of stack A. He does this till all the disks are not transferred. Your task is to find out the number of ways in which the transfer can be done. Two

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L1 Observation
L2 Technique
L3 Approach
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L5 Full solution
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solution.cppC++17

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