Prisoner of Azkaban

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*"Happiness can be found even in the darkest of times if one only remembers to turn on the light."* Harry already had a terrifying experience against the dementors. To protect himself against the dementors, he spent the winters mastering a spell $S$ with Professor Remus Lupin. He had learned that the lexicographically smaller the spell $S$, the more powerful it is. Harry and Sirius Black were fi

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solution.cppC++17

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