Tidu and frustrated teacher

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As you already, know all the school teachers hate Tidu and their favourite passtime is to trouble and torture him for no reason. One day a teacher called Atsi gave him a problem to solve which she thought he couldn’t solve. The problem was, given 3 numbers n,x and k you need to tell the number of ways of making an array of size n with all numbers being positive Atsi got furious and googled for a

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solution.cppC++17

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