import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int xp = sc.nextInt();
    int yp = sc.nextInt();
    int s = xp * xp + yp * yp;
    int r = (int)Math.sqrt(s);
    int ans = 0;
    for(int i = r; i < r + 3; i++) {
      if(i * i > s) {
        ans = i;
        break; 
      }
    }
    System.out.println(2 * ans);
  }
}