Stan Lee and Avengers

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The world is in danger. To save the world Stan Lee decided to create an army of $N$ avengers and placed them at various places across the globe. The avengers are connected to each other in the form of a connected undirected tree. Initially all of them has $0$ energy. To increase the energy of the army, Stan Lee devised a strategy. He drops a tonic of energy $x$ to $i_{th}$ avenger who has to tr

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solution.cppC++17

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