import itertools
import sys
last = list(map(int, raw_input().split()))
# last = [100, 100]
mv = [(-2,-1), (-2,1), (-1,-2), (-1,2), (1,-2), (1,2), (2,-1), (2,1)]

mv2 = list( itertools.product(mv, repeat=2) )
mv3 = list( itertools.product(mv, repeat=3) )

mv2r = []
for i in range(len(mv2)):
	x = 0
	y = 0
	for j in range(len(mv2[i])):
		x += mv2[i][j][0]
		y += mv2[i][j][1]
	mv2r.append([x,y])

a = last in mv2r
if a == True:
	print "YES"
	sys.exit()

mv3r = []
for i in range(len(mv3)):
	x = 0
	y = 0
	for j in range(len(mv3[i])):
		x += mv3[i][j][0]
		y += mv3[i][j][1]
	mv3r.append([x,y])

b = last in mv3r
if b == True:
	print "YES"
	sys.exit()

print "NO"