import java.util.*;

public class Main {
  public static void main(String[] args ) throws Exception {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M= sc.nextInt();
    int coin=0;
    int Max=Math.max(N,M);
    int Min=Math.min(N,M);
    coin=Max;
    if(Max-1>Min){
      coin+=Max-1;
    }else{
      coin+=Min;
    }
    System.out.println(coin);
  }}
/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