Favorite Sub Hair

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Little Princess Rapunzel is blessed with long (really looong!) hair, which is golden colored and has healing power. After the end of a long happy story, she marries her lover Flynn. They decide to lead a normal life by getting rid of the mysterious hair, which when cut loses its power and turns brown. There are many colorful beads on her hair in order. Rapunzel has some K favorite colors B[1...K]

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solution.cppC++17

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