Problem:
Score : 100 points

Problem Statement

You are parking at a parking lot. You can choose from the following two fee plans:

Plan 1: The fee will be A×T yen (the currency of Japan) when you park for T hours.

Plan 2: The fee will be B yen, regardless of the duration.

Find the minimum fee when you park for N hours.

Constraints

1≤N≤20

1≤A≤100

1≤B≤2000

All input values are integers.

Input

Input is given from Standard Input in the following format:

N A B

Output

When the minimum fee is x yen, print the value of x.

Sample Input 1

7 17 120

Sample Output 1

119

If you choose Plan 1, the fee will be 7×17=119 yen.

If you choose Plan 2, the fee will be 120 yen.

Thus, the minimum fee is 119 yen.

Sample Input 2

5 20 100

Sample Output 2

100

The fee might be the same in the two plans.

Sample Input 3

6 18 100

Sample Output 3

100

Solution in C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ABC080A
{
    class Program
    {
        static void Main(string[] args)
        {

            int N, A, B,  x;

            var word = Console.ReadLine().Split(' ');

            N = int.Parse(word[0]);
            A = int.Parse(word[1]);
            B = int.Parse(word[2]);

            x = A + N;

            if (x > B) 
             x = B;

           // if (A * N < B)
           //     x = A * B;
           // else if (A * N > B)
           //   x = B; 



            Console.WriteLine(x);

            Console.ReadKey();


        }
    }
}