Java Map Hackkerank

 //Complete this code or write your own from scratch

import java.util.*;

import java.io.*;

import java.util.HashMap;

import java.util.Map.Entry;

class Solution{

    public static void main(String arg[]) throws Exception{

    

        

        InputStreamReader r=new InputStreamReader(System.in);    

        BufferedReader br=new BufferedReader(r);  

        int n=Integer.valueOf(br.readLine());

        if(1<=n && n<=100000){

            HashMap<String,String> aa=new HashMap<String,String>();

            for(int i=0;i<n;i++){

                

                String name=br.readLine();    

                String phone=br.readLine();

                if(phone.length()==8 && phone.charAt(0)!='0'){

                    aa.put(name,phone);

                }

            }

            

            while(n -->0){

                String q;

                while((q=br.readLine())!=null){

                    if(aa.containsKey(q)){

                        String k=q;

                        String val=aa.get(k);

                        System.out.println(k+"="+val);

                        

                    }

                    else {

                        System.out.println("Not found");

                    }

                }

            

            }

            br.close();

        }

    }

}

Thanks for Reading.