#include <stdio.h>

int saiki( int step, int nx, int ny, int tx, int ty){
	int i;
	int ret;
	int px[] = {-1, 1,-2, 2,-2, 2,-1, 1};
	int py[] = {-2,-2,-1,-1, 1, 1, 2, 2};
	
	if( nx == tx && ny == ty){
		return 1;
	}
	if( step == 0){
		return 0;
	}
	for(i=0;i<8;i++){
		ret = saiki(step-1, nx+px[i], ny+py[i], tx, ty);
		if(ret == 1){
			break;
		}
	}
	
	return ret;
}

int main(void){
	int x, y;
	
	scanf("%d %d", &x, &y);
	
	if(saiki(3, 0, 0, x, y)){
		printf("YES\n");
	}else{
		printf("NO\n");
	}
	
	
	return 0;
}