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 Go (1.6) (judge verdict: Accepted)

package main

import (
	"bufio"
	"fmt"
	"log"
	"math"
	"os"
	"strconv"
	"strings"
)

func main() {
	n := readInt()
	a := readInt()
	b := readInt()
	fmt.Println(math.Min(float64(n*a), float64(b)))
}

func checkErr(err error) {
	if err != nil {
		log.Fatal(err)
	}
}

func toInt(s string) int {
	i, e := strconv.Atoi(s)
	checkErr(e)
	return i
}

func nextLine(scanner *bufio.Scanner) string {
	scanner.Scan()
	return scanner.Text()
}

func readInt() int {
	var num int
	_, e := fmt.Scan(&num)
	checkErr(e)
	return num
}

func readStr() string {
	var str string
	_, e := fmt.Scan(&str)
	checkErr(e)
	return str
}

func readLineAsStr() string {
	var scanner = bufio.NewScanner(os.Stdin)
	scanner.Split(bufio.ScanLines)
	return nextLine(scanner)
}

func readLineAsInts() []int {
	var scanner = bufio.NewScanner(os.Stdin)
	scanner.Split(bufio.ScanLines)
	s := strings.Split(nextLine(scanner), " ")
	ints := make([]int, len(s))
	for i, str := range s {
		ints[i] = toInt(str)
	}
	return ints
}