My Java Solution:

public static void separateNumbers(String s) { // Write your code here for(int i = 1; i <= s.length()/2; i++) {

        long firstNumber = Long.parseLong(s.substring(0, i));
        long currentNumber = firstNumber;

        StringBuilder shot = new StringBuilder();
        shot.append(currentNumber);


        while(shot.length() < s.length()){
            currentNumber++;
            shot.append(currentNumber);
        }

        if(s.equals(shot.toString()))
        {
            System.out.println("YES " + firstNumber);
            return;
        }     
    }
    System.out.println("NO");

}

}