import java.util.Scanner;

public class Main {
	static int []a;
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int X = scan.nextInt();
		int Y = scan.nextInt();
		scan.close();
		if(X == 0 && Y == 0) {
			System.out.println("YES");
			System.exit(0);
		}
		int[] dx = {-2, -2, -1, -1, 1, 1, 2, 2};
		int[] dy = {-1, 1, -2, 2, -2, 2, -1, 1};
		int x = 0;
		int y = 0;
		for(int i = 0; i < 8; i++) {
			x = dx[i];
			y = dy[i];
			if(x == X && y == Y) {
				System.out.println("YES");
				System.exit(0);
			}
			for(int j = 0; j < 8; j++) {
				x = dx[i] + dx[j];
				y = dy[i] + dy[j];
				if(x == X && y == Y) {
					System.out.println("YES");
					System.exit(0);
				}
				for(int k = 0; k < 8; k++) {
					x = dx[i] + dx[j] + dx[k];
					y = dy[i] + dy[j] + dy[k];
					if(x == X && y == Y) {
						System.out.println("YES");
						System.exit(0);
					}
				}
			}
		}
		System.out.println("NO");
	}

}