import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int Xp = 3;//sc.nextInt();
        int Yp = 2;//sc.nextInt();
        
        int d = Xp*Xp + Yp*Yp;
        int r = (int)Math.sqrt(d);
        double z = r;
        while(true){
            if(z*z<=d){
                z=z+0.5;
            }else{
                break;
            }
        }
        int a = (int)(2*z);
        System.out.println(a);
    }
}