import java.util.*;
 
class Main {
 
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int sum = 0;
        if(a > b){
            sum += a;
            a -= 1;
        }else if(a<=b){
            sum += b;
            b -= 1;
        }
              if(a > b){
            sum += a;
            a -= 1;
        }else if(a<=b){
            sum += b;
            b -= 1;
        }
System.out.println(sum);
    }
 
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz