Problem:
Score : 100 points

Problem Statement

N of us are going on a trip, by train or taxi.

The train will cost each of us A yen (the currency of Japan).

The taxi will cost us a total of B yen.

How much is our minimum total travel expense?

Constraints

All values in input are integers.

1 \leq N \leq 20

1 \leq A \leq 50

1 \leq B \leq 50

Input

Input is given from Standard Input in the following format:

N A B

Output

Print an integer representing the minimum total travel expense.

Sample Input 1

4 2 9

Sample Output 1

8

The train will cost us 4 \times 2 = 8 yen, and the taxi will cost us 9 yen, so the minimum total travel expense is 8 yen.

Sample Input 2

4 2 7

Sample Output 2

7

Sample Input 3

4 2 8

Sample Output 3

8

Solution in C (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<stdio.h>
#define A 50
#define B 50
#define N 20

int main(void)
{
    int a = 0;
    int b = 0;
    int n = 0;
    int sum_tx = 0;

    scanf("%d", &a); scanf("%d", &b); scanf("d", &n);
    if(a >= 1 && b >= 1 && n >= 1){
        if(a <= A && b <= B && n <= N){
            sum_tx = a*n;
            if(sum_tx >= b) printf("%d", b);
            else printf("%d", sum_tx);
        }
    }
    return 0;
}