Problem:
Sorting Three Numbers

Write a program which reads three integers, and prints them in ascending order.

Input

Three integers separated by a single space are given in a line.

Output

Print the given integers in ascending order in a line. Put a single space between two integers.

Constraints

1 ≤ the three integers ≤ 10000

Sample Input 1

3 8 1

Sample Output 1

1 3 8

Solution in JAVA (judge verdict: Runtime Error)

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.TreeMap;

public class Main {
    private static Scanner scan;

    public static void main(String[] args) {
        scan = new Scanner(System.in);
        System.out.println(sort(scan.nextInt() , scan.nextInt(), scan.nextInt()));
    }

    /**
     * ソートして返します。
     */
    private static String sort(int a, int b, int c) {
        List<Integer> list = new ArrayList<Integer>();
        Map<Integer, Integer> map = new TreeMap<Integer, Integer>();
        map.put(a, a);
        map.put(b, b);
        map.put(c, c);
        for(Integer hoge : map.values()) {
            list.add(hoge);
        }
        return list.get(0) + " " + list.get(1) + " " + list.get(2);
    }
}