import sys

dx = (2, 1, -1, -2, -2, -1, 1, 2)
dy = (1, 2, 2, 1, -1, -2, -2, -1)

def solve():
    a = {(0, 0)}
    cango = {(0, 0)}

    for i in range(3):
        b = set()

        for (x, y) in a:
            for k in range(len(dx)):
                b.add((x + dx[k], y + dy[k]))

        cango |= b
        a = b.copy()

    x, y = map(int, input().split())

    if (x, y) in cango:
        print('YES')
    else:
        print('NO')

if __name__ == '__main__':
    solve()