N = gets.to_i
x = gets.split.map(&:to_i)
m = x.max
dp = Array.new(m + 1, 1)
x.sort.each do |a|
  (2 * a).step(m, a) do |b|
    dp[b] = [dp[b], dp[a] + 1].max
  end
end
ans = x.map {|a| dp[a]}.max
puts ans