Chef Bakes Cake 1

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Chef is an expert baker. Each cake costs him $30$ coins to make, and then he sells each for $50$ coins. Today, Chef made a total of $N$ cakes and was able to sell $M$ cakes. The remaining cakes went unsold and were wasted. Find out how much money (in coins) Chef made from these cakes. It may be possible that the answer is negative to indicate Chef lost money. ### Input - The only line of input

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solution.cppC++17

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