from itertools import product
X, Y = map(int, input().split())

steps = [(-2, -1), (-2, 1), (-1, -2), (-1, 2),(2, -1), (2, 1), (1, -2), (1, 2)]

# 3歩
x, y = 0, 0

memo0 = [(0, 0)]
memo1 = []
for x, y in memo0:
    for ii, jj in steps:
        x1, y1 = x + ii, y + jj
        memo1.append((x1, y1))

memo2 = []
for x, y in memo1:
    for ii, jj in steps:
        x1, y1 = x + ii, y + jj
        memo2.append((x1, y1))

memo3 = []
for x, y in memo2:
    for ii, jj in steps:
        x1, y1 = x + ii, y + jj
        memo3.append((x1, y1))

memo_all = memo0 + memo1 + memo2 + memo3

if (X, Y) in memo_all:
    print('YES')
else:
    print('NO')