Chocolates

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A Child wants to buy N chocolates from the shop. He has to pay K rupees for the first chocolate, 2K rupees for the second one and so on. He has X rupees. How many rupees does he have to borrow from his friend to buy N chocolates? Input The first line contains three positive integers N,K,X. - K - the cost of the first chocolate - X - initial amount of rupees the child have - N - the number

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solution.cppC++17

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