FUNCTION QUERIES

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$Chef$ and his $friend$ are playing $PUBG$. Chef is $knocked$ $Out$ by enemies. His friend is about $30$ $m$ away from him. The game is in its closing minutes. Chef's friend do not want to risk his life for Chef. So, Chef's friend asks a query to Chef. If he answers it, his friend will try to $revive$ him. $A,B,X,Y,i$ are integers. Function $F$ is defined as, ``` if i = 0 : F(i) = X

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solution.cppC++17

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