import java.util.*;
public class Main {

    public static void main(String[] args) {
        Scanner yomi = new Scanner(System.in);
        byte a = yomi.nextByte();
        byte b = yomi.nextByte();
        int kai=0;
        for (byte i=0;i<2;i++){
            if (a>b){
                kai=kai+a;
                a--;
            }else {
                kai = kai + b;
                b--;

            }
        }
        System.out.println(kai);

        }

    }
/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