X,Y = map(int, input().split())
reached = set()

def search(x, y, s):
    if s < 0:
        return
    reached.add((x, y))
    search(x-2, y-1, s-1)
    search(x-2, y+1, s-1)
    search(x-1, y-2, s-1)
    search(x-1, y+2, s-1)
    search(x+1, y-2, s-1)
    search(x+1, y+2, s-1)
    search(x+2, y-1, s-1)
    search(x+2, y+1, s-1)

search(0, 0, 3)
if (X, Y) in reached:
    print('YES')
else:
    print('NO')