N = gets.to_i
X = gets.split.map(&:to_i).sort
M = X.last

dp = Array.new(M + 1, 0)
ans = 0

X.each do |x|
  dp[x] = 1 if dp[x] == 0
  ans = dp[x] if ans < dp[x]

  (2 * x).step(M, x) do |i|
    dp[i] = dp[x] + 1 if dp[i] < dp[x] + 1
  end
end

puts ans