Sonesh in GadgetLand

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GadgetLand is famous for gadgets(obviously) and magic. It has N shops and each has magic power. Power of ith shop is given by a single integer Pi. Initially there are M bidirectional roads in GadgetLand between shops. A "Batch" is set of all the shops in which each shop can be reached by every other shop of the set. Batch Power of a batch is defined as xor sum of power of all the shops in the bat

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solution.cppC++17

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