Score : $100$ points
You are parking at a parking lot. You can choose from the following two fee plans:
Find the minimum fee when you park for $N$ hours.
Input is given from Standard Input in the following format:
$N$ $A$ $B$
When the minimum fee is $x$ yen, print the value of $x$.
7 17 120
Thus, the minimum fee is $119$ yen.
5 20 100
The fee might be the same in the two plans.
6 18 100