knight = [[-2, -1], [-2, 1], [-1, -2], [-1, 2], [1, -2], [1, 2], [2, -1], [2, 1]]
memo = [[0, 0]]
for i in range(0, 3):
	N = len(memo)
	for j in range(0, N):
		for k in range(0, 8):
			if [memo[j][0]+knight[k][0], memo[j][1]+knight[k][1]] not in memo:
				memo.append([memo[j][0]+knight[k][0], memo[j][1]+knight[k][1]])
X, Y = map(int, raw_input().split())
if [X, Y] in memo: print 'YES'
else: print 'NO'