M = [
    {dx: 2, dy: 1},
    {dx: -2, dy: 1},
    {dx: 2, dy: -1},
    {dx: -2, dy: -1},
    {dx: 1, dy: 2},
    {dx: -1, dy: 2},
    {dx: 1, dy: -2},
    {dx: -1, dy: -2}
]

available = [{x:0,y:0}]
3.times.inject([{x:0,y:0}]){ |s,i|
    next_positions = s.product(M).map { |pos, move|
        { x: pos[:x] + move[:dx], y: pos[:y] + move[:dy]}
    }
    available.push(next_positions)
    next_positions
}
x,y = gets.split.map(&:to_i)

puts available.flatten.uniq.include?({x: x, y: y}) ? "YES" : "NO"