Aman Jr and Crazy Cataloguing

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Aman Jr. is a very organized student. He is preparing for IIT-JEE 2042 and is set to get AIR-1 thanks to his unique Book catalogue. Aman’s book catalogue is in the form of a directed tree with N shelves (that is, each node is in the form of a shelf). Each shelf has compartments numbered from 1 to M. [You can visualize the shelf as an array of compartments]. The tree is rooted at Shelf 1. Despite

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