import java.util.Scanner;
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;
		int big = Math.max(a, b);
		int small = Math.min(a,b);
		sum += big;
		big--;
		sum += Math.max(big,small);
		System.out.println(sum);
	}
} import java.util.Scanner; Scanner 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;
		int big = Math.max(a, b);
		int small = Math.min(a,b);
		sum += big;
		big--;
		sum += Math.max(big,small);
		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;
		int big = Math.max(a, b);
		int small = Math.min(a,b);
		sum += big;
		big--;
		sum += Math.max(big,small);
		System.out.println(sum);
	} main {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int sum = 0;
		int big = Math.max(a, b);
		int small = Math.min(a,b);
		sum += big;
		big--;
		sum += Math.max(big,small);
		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 int big = Math.max(a, b); big Math.max(a, b) Math.max Math a b int small = Math.min(a,b); small Math.min(a,b) Math.min Math a b sum += big sum big big-- big sum += Math.max(big,small) sum Math.max(big,small) Math.max Math big small 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;
		int big = Math.max(a, b);
		int small = Math.min(a,b);
		sum += big;
		big--;
		sum += Math.max(big,small);
		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;
		int big = Math.max(a, b);
		int small = Math.min(a,b);
		sum += big;
		big--;
		sum += Math.max(big,small);
		System.out.println(sum);
	}
} Main
import java.util.Scanner;
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;
		int big = Math.max(a, b);
		int small = Math.min(a,b);
		sum += big;
		big--;
		sum += Math.max(big,small);
		System.out.println(sum);
	}
}