import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
//import java.io.PrintWriter;
//import java.util.HashMap;
import java.util.StringTokenizer;


public class test {
    public static void main(String[] args) throws NumberFormatException, IOException{
       // PrintWriter pw= new PrintWriter(System.out);
        // StringBuffer buff=new StringBuffer("");
        StringTokenizer token;
        BufferedReader in= new BufferedReader(new InputStreamReader(System.in));
        token=new StringTokenizer(in.readLine());
        int n=Integer.parseInt(token.nextToken());
        int m=Integer.parseInt(token.nextToken());

        System.out.println((n-1)+(m-1));
        //pw.flush();
       // pw.close();
    }
}