M & Chocolate

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Sandhya is very fond of a chocolate $C$. She wants to buy exactly $K$ chocolates of this type from $K$ different shops, one from each shop. She has a list $A$ of the cost of chocolate $C$ of size $N$. She wants to spend the minimum possible amount. Also, she doesn't want two chocolates of the same price, i.e if she has purchased a chocolate with price 5, she will not go to other shops which offer

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solution.cppC++17

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