Bob and his problem

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Bob likes trees and XOR (Exclusive OR) very much. So he created a tree with each edge having a weight associated with it. One day his friend Alice came to his house, after playing video games for some time they got bored and decided to play something else. Bob showed the tree to Alice and told her that given any 2 vertices in the tree he can tell the XOR of all the weights on the unique path join

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solution.cppC++17

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