def moves(x, y):
    dx = (-2, -2, -1, -1, +1, +1, +2, +2)
    dy = (-1, +1, -2, +2, -2, +2, -1, +1)
    return [(x+dx[i], y+dy[i]) for i in range(8)]

X, Y = map(int, raw_input().split())
pos = set([(X, Y)])
for i in range(3):
    s = set(pos)
    for (x0, y0) in s:
        for (x, y) in moves(x0, y0):
            pos.add((x, y))
if (0, 0) in pos:
    print('YES')
else:
    print('NO')