from collections import deque
x,y=map(int,input().split())
p=[[0,0]]
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.append([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')