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

public class Main {
    
    public static Scanner sc = new Scanner(System.in);
    public static PrintWriter pw = new PrintWriter(System.out);
    
    public static void main(String[] args) {
        
        int t = 1;
        while( t > 0 ) {
            solve();
            t--;
        }
        
        pw.flush();
        
    }
    
    static void solve() {
        
        int A = sc.nextInt();
        int B = sc.nextInt();
        int ans = 0;
        if( A == B ) {
            ans += 2*A;
        }else {
            if( A > B ) {
                int temp = A;
                A = B;
                B = temp;
            }
            ans += 2*A+1;
            B -= A+1;
            A = 0;
            ans += 2*B;
        }
        
        pw.println(ans);
        
    }
    
}