import java.util.Scanner;

class Question098
{
	public static void main(String[] args)
	{
	
		Scanner scan = new Scanner(System.in);
		
		int x = scan.nextInt();
		int y = scan.nextInt();
		int r = (int)Math.ceil(Math.sqrt(x+y));
		
		System.out.println(2*r);
	}
}