Bytelandian Shoppers

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There are N shoppers today at the Bytelandian Shopping Mall. There are M different items at sale at the mall. In how many ways can shoppers purchase R items in all such that everyone buys atleast one item, and every item is brought by atleast one person ? A shopper can purchase any particular item at most once. Input : The first line contains the number of test cases T. T lines follow containing

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solution.cppC++17

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