import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        int n; 
        int m;
        int times;
        String strValue;
        String[] strArray = new String[2];
        int[] valArray = new int[2] ;
        // int area;
        //area = m * n;
        Scanner scan = new Scanner(System.in);
        strValue = scan.nextLine();
        strArray = strValue.split(" ");
        for(int i=0; i<2; i++){
            valArray[i] = Integer.parseInt(strArray[i]);
        }
        m = valArray[0];
        n = valArray[1];
        times = (m - 1) + n - 1;
        System.out.println(times);
    }
}