Whatsapp Messages

CodeChefOpen on judge ↗

Chef recently installed Whatsapp on his mobile device. Currently, he has no unread messages. Every hour, he receives $X$ messages and he is able to read $Y$ messages out of them. After some time Chef notices that he has several unread messages. Can you tell him exactly how many unread messages Chef has after $Z$ hours have passed? ### Input - The first line of input will contain a single integ

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solution.cppC++17

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