dx = [-2,-2,-1,-1,1,1,2,2]
dy = [-1,1,-2,2,-2,2,-1,1]

ans = [(0,0)]
def dfs(x, y, i):
    if i == 3:
        return 
    for dxi, dyi in zip(dx, dy):
        ans.append((x+dxi,y+dyi))
        dfs(x+dxi, y+dyi, i+1)

X,Y = map(int,input().split())    
dfs(0, 0, 0)

if (X,Y) in ans:
    print('YES')
else:
    print('NO')