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

P = [(0, 0)]
seen = set([(0, 0)])
for _ in range(3):
    NP = []
    for cx, cy in P:
        for dx, dy in Directions:
            nx, ny = cx + dx, cy + dy
            if (nx, ny) in seen:
                continue
            seen.add((nx, ny))
            NP.append((nx, ny))
    P = NP

x, y = map(int, input().split())
if (x, y) in seen:
    print("YES")
else:
    print("NO")