import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);;
        while(sc.hasNext()) {
            String[] line = sc.nextLine().split(" ");
            int sum = Integer.parseInt(line[0]) + Integer.parseInt(line[1]);
            System.out.println(String.valueOf(sum).length());
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);;
        while(sc.hasNext()) {
            String[] line = sc.nextLine().split(" ");
            int sum = Integer.parseInt(line[0]) + Integer.parseInt(line[1]);
            System.out.println(String.valueOf(sum).length());
        }
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);;
        while(sc.hasNext()) {
            String[] line = sc.nextLine().split(" ");
            int sum = Integer.parseInt(line[0]) + Integer.parseInt(line[1]);
            System.out.println(String.valueOf(sum).length());
        }
    } main {
        Scanner sc = new Scanner(System.in);;
        while(sc.hasNext()) {
            String[] line = sc.nextLine().split(" ");
            int sum = Integer.parseInt(line[0]) + Integer.parseInt(line[1]);
            System.out.println(String.valueOf(sum).length());
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) while(sc.hasNext()) {
            String[] line = sc.nextLine().split(" ");
            int sum = Integer.parseInt(line[0]) + Integer.parseInt(line[1]);
            System.out.println(String.valueOf(sum).length());
        } sc.hasNext() sc.hasNext sc {
            String[] line = sc.nextLine().split(" ");
            int sum = Integer.parseInt(line[0]) + Integer.parseInt(line[1]);
            System.out.println(String.valueOf(sum).length());
        } String[] line = sc.nextLine().split(" "); line sc.nextLine().split(" ") sc.nextLine().split sc.nextLine() sc.nextLine sc " " int sum = Integer.parseInt(line[0]) + Integer.parseInt(line[1]); sum Integer.parseInt(line[0]) + Integer.parseInt(line[1]) Integer.parseInt(line[0]) Integer.parseInt Integer line[0] line 0 Integer.parseInt(line[1]) Integer.parseInt Integer line[1] line 1 System.out.println(String.valueOf(sum).length()) System.out.println System.out System System.out String.valueOf(sum).length() String.valueOf(sum).length String.valueOf(sum) String.valueOf String sum String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);;
        while(sc.hasNext()) {
            String[] line = sc.nextLine().split(" ");
            int sum = Integer.parseInt(line[0]) + Integer.parseInt(line[1]);
            System.out.println(String.valueOf(sum).length());
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);;
        while(sc.hasNext()) {
            String[] line = sc.nextLine().split(" ");
            int sum = Integer.parseInt(line[0]) + Integer.parseInt(line[1]);
            System.out.println(String.valueOf(sum).length());
        }
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);;
        while(sc.hasNext()) {
            String[] line = sc.nextLine().split(" ");
            int sum = Integer.parseInt(line[0]) + Integer.parseInt(line[1]);
            System.out.println(String.valueOf(sum).length());
        }
    }
}