$dx = [-2, -2, -1, -1, 1, 1, 2, 2]
$dy = [-1, 1, -2, 2, -2, 2, -1, 1]
$cx = 0
$cy = 0
def process(x, y, n)
    if $cx == x && $cy == y
        return true
    elsif n >= 3
        return false
    end
    find = false
    8.times do |i|
        find = process(x + $dx[i], y + $dy[i], n + 1)
        if find
            break
        end
    end
    return find
end
str = gets.split
$cx = str[0].to_i
$cy = str[1].to_i
if process(0, 0, 0)
    puts "YES"
else
    puts "NO"
end