@tx,@ty=gets.split(" ").map(&:to_i)

def calc(x,y,tick)
    return if tick<0
    if (@tx==x && @ty==y)
        puts"YES"
        exit 0
    end
    calc(x-2,y-1,tick-1)
    calc(x-2,y+1,tick-1)
    calc(x-1,y-2,tick-1)
    calc(x-1,y+2,tick-1)
    calc(x+2,y-1,tick-1)
    calc(x+2,y+1,tick-1)
    calc(x+1,y-2,tick-1)
    calc(x+1,y+2,tick-1)
end


calc(0,0,3)
puts "NO"