AOJ volume10007 Swapping Two Numbers
import java.util.*; public class SwappingTwoNumbers{ public static void main(String[] args){ Scanner sc = new Scanner(System.in); ArrayList<String> result = new ArrayList<String>(); while(sc.hasNextLine()){ int a = sc.nextInt(); int b = sc.nextInt(); if(a == 0 && b == 0){ break; } if(a > b){ int tmp = a; a = b; b = tmp; } result.add(a + " " + b); } for(int i = 0; i < result.size(); i++){ System.out.println(result.get(i)); } } }