Carry

import java.util.Scanner;

public class Carry {
  private static int carry(long m1, long m2) {
    int carry = 0, c = 0;
    while (m1 != 0 || m2 != 0) {
      c = (int )((m1 % 10) + (m2 % 10) + c) / 10;
      carry += c;
      m1 /= 10;
      m2 /= 10;
    }
    return carry + c;
  }

  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    System.out.println(carry(in.nextLong(), in.nextLong()));
    in.close();
  }
}