package main

import (
	"bufio"
	"fmt"
	"log"
	"os"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)

func init() {
	sc.Split(bufio.ScanWords)
}

func input() string {
	sc.Scan()
	return sc.Text()
}

func main() {
	a, err := strconv.Atoi(input())
	if err != nil {
		log.Fatal(err)
	}
	b, err := strconv.Atoi(input())
	if err != nil {
		log.Fatal(err)
	}

	if a == b {
		fmt.Println(a*2 - 1)
	} else if a > b {
		fmt.Println(b * 2)
	} else {
		fmt.Println(a * 2)
	}
}