xy = list(map(int, input().split(' ')))

df = [
    [1, 2],
    [-1, 2],
    [1, -2],
    [-1, -2],
    [2, 1],
    [-2, 1],
    [2, -1],
    [-2, -1]
]

def check(pos, cand, n):
    if n == 0:
        return 'NO'
    else:
        result = []
        for c in cand:
            for d in df:
                temp = [
                    c[0] + d[0],
                    c[1] + d[1]
                ]
                if temp[0] == pos[0] and temp[1] == pos[1]:
                    return 'YES'
                else:
                    result.append(temp)
        return check(pos, result, n - 1)

current = [[0, 0]]
result = check(xy, current, 1)
print(result)