import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int m = in.nextInt();
        int result = 1;
        if(n>1)
            result = n-1;
        if(m>1)
            result = (m-1)+result;
        System.out.println(result );
    }
}