import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] dx = {-2,-2,-1,-1,1,1,2,2};
		int[] dy = {-1,1,-2,2,-2,2,-1,1};
		Queue<Integer> xque = new LinkedList<>();
		Queue<Integer> yque = new LinkedList<>();
		int X = sc.nextInt();
		int Y = sc.nextInt();
		if(X==0 && Y == 0){
			System.out.println("YES");
			return;
		}
		xque.add(0);
		yque.add(0);
		for(int i=0;i<3;i++){
			int len = xque.size();
			for(int j=0;j<len;j++){
				int nowx = xque.poll();
				int nowy = yque.poll();
				for(int k=0;k<dx.length;k++){
					int nextx = nowx + dx[k];
					int nexty = nowy + dy[k];
					if(X == nextx && Y == nexty){
						System.out.println("YES");
						return;
					}
					xque.add(nextx);
					yque.add(nexty);
				}
			}
		}
		for(int i=0;i<xque.size();i++){
			if(X==xque.poll() && Y == yque.poll()){
				System.out.println("YES");
				return;
			}
		}
		System.out.println("NO");
	}
}