codeforces 100935B WeirdCryptography program in java

WeirdCryptography.java

import java.util.Scanner;
public class WeirdCryptography
{
    public static void main(String[] args)
    {
        Scanner z=new Scanner(System.in);
        String ans="";
        int cas=1;
        while(true)
        {
            int a=z.nextInt();
            if(a==0)
                break;
            String[] ar=new String[a];
            String x="";
            for(int i=0;i<ar.length;i++)
                ar[i]=z.next();
            x=ar[0];
            for(int i=1;i<ar.length;i++){
                if(!x.contains(ar[i]))
                    x+=","+ar[i];
            }
            String br[]=x.split(",");
            int[] arr=new int[br.length];
            for(int i=0;i<br.length;i++){
                int cnt=0;
                for(int j=0;j<ar.length;j++){
                    if(br[i].equals(ar[j]))
                        cnt++;
                }
                arr[i]=cnt;
            }
            String op="";
            while(true){
                boolean flag=false;
                int xflag=0;
                for(int i=0;i<arr.length;i++){
                    if(arr[i]>0){
                        arr[i]--;
                        xflag++;
                    }
                }
                op+=Integer.toString(xflag);
                for(int i=0;i<arr.length;i++){
                    if(arr[i]!=0)
                        flag=true;
                }
                if(!flag)
                    break;
            }
            StringBuilder sb=new StringBuilder(op);
            ans += "Case "+cas+++": "+sb.reverse()+"\n";
        }
        System.out.println(ans);
    }
}