X,Y = map(int,input().split())
s = set()
s.add((0,0))
d = []
for i in (2,-2):
    for j in range(1,-1):
        d.append((i,j))
        d.append((j,i))
for _ in range(3):
    t = set()
    for x,y in s:
        for dx,dy in d:
            t.add((x+dx,y+dy))
    s = t
if (X,Y) in s:
    print('Yes')
else:
    print('No')