Racing Refuels

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In racing, you refuel your car in the pitstops, and it’s very important to carefully plan pit stops. 1 unit of fuel is enough for exactly 1 lap. At the beginning of each lap, the number of units of fuel in your car must be a positive integer that doesn't exceed the tank capacity N, and it will decrease by 1 during a lap. After each lap, you can spend P seconds to visit a pit stop and refuel your

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