D={}
D[(0,0)]=1

d={}
X=[0,1,1,-1,-1,2,2,-2,-2]
Y=[0,2,-2,2,-2,1,-1,1,-1]

import copy

for i in range(3):
    for k,v in D.items():
        k0,k1=k
        for xy in range(9):
            d[(k0+X[xy],k1+Y[xy])]=1
    D=copy.deepcopy(d)
    d={}
#print(len(D))

X,Y=map(int,input().split())
if (X,Y) in D:
    print("YES")
else:
    print("NO")