import java.util.*;

public class Main {
	public static void main (String[] args) {
    	Scanner sc = new Scanner(System.in);
    	int x = sc.nextInt();
    	int y = sc.nextInt();
    	int[] xArr = new int[]{-2, -2, 2, 2, -1, -1, 1, 1};
    	int[] yArr = new int[]{-1, 1, -1, 1, -2, 2, -2, 2};
    	for (int i = 0; i < 8 * 8 * 8; i++) {
    	    int key = i;
    	    int xx = 0;
    	    int yy = 0;
    	    for (int j = 0; j < 3; j++) {
    	        xx += xArr[key % 8];
    	        yy += yArr[key % 8];
    	        key /= 8;
         	    if (xx == x && yy == y) {
        	        System.out.println("YES");
        	        return;
        	    }
   	        }
    	}
    	System.out.println("NO");
	}
}