package main
import (
	"fmt"
    "math"
)
func main() {
  var a,b int
  fmt.Scanf("%d %d",&a,&b)
  var ans=a+b
  if(math.Abs(float64(a-b))-1>=0){
    ans+=int(math.Abs(float64(a-b)))-1
  }
  fmt.Printf("%d\n",ans)
}