import java.util.*;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int sum = 0;
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		System.out.println(sum);
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int sum = 0;
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		System.out.println(sum);
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int sum = 0;
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		System.out.println(sum);
	} main {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int sum = 0;
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		System.out.println(sum);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int sum = 0; sum 0 if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		} a < b a b {
			sum += b;
			b = b-1;
		} sum += b sum b b = b-1 b b-1 b 1 {
			sum += a;
			a = a-1;
		} sum += a sum a a = a-1 a a-1 a 1 if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		} a < b a b {
			sum += b;
			b = b-1;
		} sum += b sum b b = b-1 b b-1 b 1 {
			sum += a;
			a = a-1;
		} sum += a sum a a = a-1 a a-1 a 1 System.out.println(sum) System.out.println System.out System System.out sum String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int sum = 0;
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		System.out.println(sum);
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int sum = 0;
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		System.out.println(sum);
	}
} Main
import java.util.*;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int sum = 0;
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		if (a < b){
			sum += b;
			b = b-1;
		}else{
			sum += a;
			a = a-1;
		}
		System.out.println(sum);
	}
}
