#include <bits/stdc++.h>
#define all(v) v.begin(), v.end()
auto cmx = [](auto& a, auto b){if (a < b) {a = b; return true;} return false;};

auto divisors(int n) {
  auto ret = std::vector< std::vector< int > >(n);
  for (auto i = 1; i < n; i++) {
    for (auto j = i; j < n; j += i) {
      ret.at(j).emplace_back(i);
    }
  }
  return ret;
}

int main() {
  std::cin.tie(0); std::cin.sync_with_stdio(false);
  int n; std::cin >> n;
  std::vector< int > a(n);
  for (auto & x : a) std::cin >> x;
  auto max = *std::max_element(all(a));
  auto divs = divisors(max + 1);

  std::vector< int > lds(max + 1, 0);
  for (auto x : a) {
    if (x == 1) {
      cmx(lds.at(x), 1);
      continue;
    }
    for (auto y : divs.at(x)) {
      if (x == y) continue;
      cmx(lds.at(x), lds.at(y) + 1);
    }
  }
  auto ret = *std::max_element(all(lds));
  std::cout << ret << std::endl;
  return 0;
}