BITS and Bitcoins

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The BITS Pilani campus takes the form of a rooted tree where each building acts as a vertex and the roads as the edges. There are a total of $N$ buildings indexed from 0 to $N$-$1$, Gautam is very fond of bitcoins and every building has some non-zero no of bitcoins hidden in a digital safe. He starts from the building with index 0 and travels to adjacent buildings to collect bitcoins , his goal is

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solution.cppC++17

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