public static void kaprekarNumbers(int p, int q) {
    // Write your code here
    boolean Found=false;
    for(int i=p;i<=q;i++){
       
        int temp=i;
        String str=Integer.toString(temp);
        int len=str.length();       
        BigInteger I=new BigInteger(str);
        BigInteger N=I.multiply(I);
        String str2=N.toString();
        int len2=str2.length();
        if(len2==1){
            if(N.equals(I)){
                    System.out.print(i+" ");
            Found=true;
            }
        }else{
        int num1=Integer.parseInt(str2.substring(0, len2-len));
        int num2=Integer.parseInt(str2.substring(len2-len, len2));
        if((num1+num2)==i){
            System.out.print(i+" ");
            Found=true;
        }
        }}
        if(!Found){
            System.out.println("INVALID RANGE");
        }
    }