1.2-3

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String[] s = sc.nextLine().split(" ");
        double x1 = Double.parseDouble(s[0]);
        double y1 = Double.parseDouble(s[1]);
        double r1 = Math.abs(Double.parseDouble(s[2]));
        s = sc.nextLine().split(" ");
        double x2 = Double.parseDouble(s[0]);
        double y2 = Double.parseDouble(s[1]);
        double r2 = Math.abs(Double.parseDouble(s[2]));
        double l = Math.sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
        if (l==0 && r1==r2 && r1>0 && r2>0){
            System.out.println("infinity");
        }
        else{
            if ((Math.abs((r1+r2)-l)<Math.pow(10,-6)) || (Math.abs(Math.abs(r1-r2)-l)<Math.pow(10,-6))){
                System.out.println(1);
            }
            else{
                if ((l-r1-r2<Math.pow(10,-6) && r1+l-r2>Math.pow(10,-6) && r2+l-r1>Math.pow(10,-6))){
                    System.out.println(2);
                }
                else{
                    System.out.println(0);
                }
            }

        }
    }
}