n,m=gets.split.map &:to_i
x={}
y={}
m.times{
  b=gets.split.map(&:to_i)
  c=b[0]
  x[c]=[] unless x[c]
  x[c]<<b[1]
  c=b[1]
  y[c]=[] unless y[c]
  y[c]<<b[0]
}
f=false
x.keys.max.downto(0){|v|
  if x[v]&&x[v].size>0
    print 1
    y[v].each{|i|
      x[i].delete v
    } if y[v]
    f=true
  elsif f
    print 0
  end
}
puts ""