java版
import java.util.*; public class Main{ public static void main(String[] args) { Scanner sc = new Scanner(System.in); while (sc.hasNext()) { String str = sc.nextLine(); //!!! String[] s = str.split(" "); ArrayList<String> list = new ArrayList<String>(); for(String str1 : s) list.add(str1); Collections.sort(list); for(int i = 0; i < s.length - 1; i++){ System.out.print(list.get(i)); System.out.print(" "); } System.out.println(list.get(s.length - 1)); } } }