ambiguous permutation

import java.io.*;
import java.util.Scanner;

public class test {

    public int search(int i,String a[])
    {

       for(int j=0;j<a.length;j++)
       {

           if(Integer.parseInt(a[j])==i)
           {

               return j+1;
           }

       }
        return 0;
    }
    public static void main(String[] args)throws IOException {

        int count=1;
        test ob = new test();
        BufferedReader br =  new BufferedReader(new InputStreamReader(System.in));

        while(true)
        {

            if(Integer.parseInt(br.readLine()) ==0)
            {
                break;
            }
            String str = br.readLine();
            String a[] =  str.split(" ");

         for(int i=0;i<a.length;i++)   
         {

             if(Integer.parseInt(a[i])==ob.search(i+1, a))
             {
                 count=1;
                 continue;

             }
             count=0;
         }

         if(count==1)
         {
             System.out.println("ambiguous");
         }
         else
         {
             System.out.println("not ambiguous");
         }

        }

    }
}

its exceeding time limit :(

i dont understand.... plz help