    import java.util.Scanner;
     
     
    public class Main{
     
    	public static void main(String[] args) {
    		Scanner sc = new Scanner(System.in);
     
    		int a=Integer.parseInt(sc.next());
    		int b=Integer.parseInt(sc.next());;
    		int sum=0;
     
    		for(int i=0;i<2;i++){
    			if(a>=b){
    				sum+=a;
    				a=a-1;
    			}else{
    				sum+=b;
    				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