Buy Masks

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You go to a shop to buy masks in this pandemic. Now, there are 3 different types of packets of mask - A packet of 10 masks - A packet of 5 masks - A packet of 1 mask You are given the costs of each packet. A packet of **10** masks costs Rs. $X$, a packet of **5 masks** costs Rs. $Y$ and a packet of **1 mask** costs Rs. $Z$. You need to find the minimum sum of rupees you need to pay

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solution.cppC++17

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