def fa(N,x,y):
	pd[x,y]=1
	if N>0:
		fa(N-1,x-2,y-1)
		fa(N-1,x-2,y+1)
		fa(N-1,x+2,y-1)
		fa(N-1,x+2,y+1)
		fa(N-1,x-1,y-2)
		fa(N-1,x+1,y-2)
		fa(N-1,x-1,y+2)
		fa(N-1,x+1,y+2)
pd={}
fa(3,0,0)
X,Y=map(int,input().split())
if (X,Y) in pd: print("YES")
else:           print("NO")