Dark Knight

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JOKER is preparing to dive into the acid bath with Harley but our so called hero Batman somehow gets this info and decides to revenge him for killing Rachel . For this Batman should reach the top floor. The building has a number of staircases and he likes to climb each staircase 1, 2, or 3 steps at a time . But still, he wonders how many ways there are to reach the top of the staircase. Given the

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solution.cppC++17

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