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) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
    Scanner in=new Scanner(System.in);
		
		long n=in.nextLong();
		long m=in.nextLong();
		
		
		long nLines=n-1;
		long mLines=m-1;
		

		System.out.println(mLines+nLines);
    }
}