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 cutx;
        int cuty;
        if(n == 1)
          cutx = 0;
        else
          cutx = n-1 ;
        if(m == 1)
          cuty = 0;
        else
          cuty = m-1;
     long answer = merafucn(cutx , cuty);
        
       System.out.println(answer);
    }
    
     public static long merafucn(long x , long y)
     {
        return x +y ;
            
        
     }
}