Mileage matters

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Chef wants to rent a car to travel to his restaurant which is $N$ kilometers away. He can either rent a petrol car or a diesel car. One litre of petrol costs $X$ rupees and one litre of diesel costs $Y$ rupees. Chef can travel $A$ kilometers with one litre of petrol and $B$ kilometers with one litre of diesel. Chef can buy petrol and diesel in any amount, not necessarily integer. For example, if

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solution.cppC++17

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