from collections import deque
x,y=map(int,input().split())
p=set()
dy=[-1,1,-2,2,2,-2,-1,1]
dx=[-2,-2,-1,-1,1,1,2,2]
q=deque()
q.append([0,0,0])
while q:
    nowx,nowy,cnt=q.popleft()
    if cnt==4:
        continue
    for i in range(8):
        if (nowx+dx[i],nowy+dy[i]) in p:
            continue
        p.add((nowx+dx[i],nowy+dy[i]))
        q.append([nowx+dx[i],nowy+dy[i],cnt+1])
print('YES' if (x,y) in p else 'NO')