def main():
    gx, gy = map(int, input().split())

    def dfs(x, y, n):
        if n > 3:
            return False
        if x == gx and y == gy:
            return True

        dx = [-2, -2, -1, -1, 1, 1, 2, 2]
        dy = [-1, 1, -2, 2, -2, 2, -1, 1]
        return any(dfs(x + dx[i], y + dy[i], n + 1) for i in range(8))

    if dfs(0, 0, 0):
        print("YES")
    else:
        print("NO")


if __name__ == "__main__":
    main()