package main

import "fmt"

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

func main() {
	var A, B int
	fmt.Scan(&A, &B)
	if A == B {
		fmt.Println(A + B - 1)
	} else {
		fmt.Println(min(A, B) * 2)
	}
}