import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int A = scanner.nextInt();
        int B = scanner.nextInt();

        // AliceとBobが文句を言わないかどうかを判定
        boolean canShareEqually = Math.abs(A - B) <= Math.min(A, B);

        if (canShareEqually) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}