import java.io.*;

class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = br.readLine();
        int A,B;
        String[] sb = str.split(" ");
        A = Integer.parseInt(sb[0]);
        B = Integer.parseInt(sb[1]);
        int ans;
        if (A > B){
            ans = 2 * A - 1;
        } else if (A < B) {
            ans = 2 * B - 1;
        } else {
            ans = 2 * A;
        }
        System.out.println(ans);
    }
}
/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