UVa Problem ID 482 (Permutation Arrays)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
 public static void main(String[] args) throws IOException 
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuffer sb=new StringBuffer("");
       
        int t=Integer.parseInt(br.readLine());
        if(t<0)
         System.exit(0);
        for (int i = 0; i s1.length)
          min=s1.length;
         for (int j = 0; j 0)
          sb.append("\n");
         for (int j = 0; j < a.length; j++) {
          if(a[j]==null)
           a[j]="";
    sb.append(a[j]+"\n");
   }
         
        }
        System.out.print(sb);
    }

}