import java.util.*;
import java.math.*;
import java.text.*;

public class Main {
    private static Scanner sc = new Scanner(System.in);
    private static int gx;
    private static int gy;
    public static void main(String[] args) throws Exception {
        gx = sc.nextInt();
        gy = sc.nextInt();
        
        if (move(0, 0, 0)) {
            System.out.println("YES");
        } else {
            System.out.println("NO");
        }
    }
    
    public static boolean move(int x, int y, int c) {
        if (c > 3) return false;
        if (x == gx && y == gy) return true;
        
        int[] dx = {1, 2, 2, 1, -1, -2, -2, -1};
        int[] dy = {2, 1, -1, -2, -2, -1, 1, 2};
        
        for (int i = 0;i < 8;i++) {
            int nx = x + dx[i];
            int ny = y + dy[i];

            if (move(nx, ny, c+1)) {
                return true;
            }
        }
        return false;
    }
}