table=[[False for i in range(15)] for j in range(15)]
L=[(0,0)]
table[6][6]=True
for r in range(3):
    M=[]
    for x,y in L:
#        print x,y
        for dx,dy in [(-2,-1),(-2,+1),(-1,-2),(-1,+2),(+1,-2),(+1,+2),(+2,-1),(+2,+1)]:
            M.append((x+dx,y+dy))
            table[x+dx+6][y+dy+6]=True
    L=M

X,Y=map(int,raw_input().split())
if X<-6 or X>6 or Y<-6 or Y>6:
    print "NO"
    exit()
if table[X+6][Y+6]:
    print "YES"
else:
    print "NO"