import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        System.out.println(Math.max(a + a - 1, Math.max(b + b - 1, a + b)));
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        System.out.println(Math.max(a + a - 1, Math.max(b + b - 1, a + b)));
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        System.out.println(Math.max(a + a - 1, Math.max(b + b - 1, a + b)));
    } main {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        System.out.println(Math.max(a + a - 1, Math.max(b + b - 1, a + b)));
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = Integer.parseInt(sc.next()); a Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int b = Integer.parseInt(sc.next()); b Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc System.out.println(Math.max(a + a - 1, Math.max(b + b - 1, a + b))) System.out.println System.out System System.out Math.max(a + a - 1, Math.max(b + b - 1, a + b)) Math.max Math a + a - 1 a + a a a 1 Math.max(b + b - 1, a + b) Math.max Math b + b - 1 b + b b b 1 a + b a b String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        System.out.println(Math.max(a + a - 1, Math.max(b + b - 1, a + b)));
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        System.out.println(Math.max(a + a - 1, Math.max(b + b - 1, a + b)));
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        System.out.println(Math.max(a + a - 1, Math.max(b + b - 1, a + b)));
    }
}
