#include <iostream>
#include <algorithm>
#include <vector>
#include <map>

using namespace std;
using vi = vector<int>;

void ins() {}
template<class T,class... Rest>void ins(T& v,Rest&... rest){cin>>v;ins(rest...);}

#define rep(i,n) for(int i=0,_i=(n);i<_i;++i)
#define all(f,c,...) (([&](decltype((c)) cccc) { return (f)(begin(cccc), end(cccc), ## __VA_ARGS__); })(c))

int main() {
  int N;
  ins(N);

  vi x(N);
  rep(i, N) {
    cin >> x[i];
  }
  all(sort, x);
  map<int, int> dp;
  int ans = 0;
  rep(i, N) {
    for (int j = 1; j * j <= x[i]; ++j) {
      if (x[i] % j == 0)
        dp[x[i]] = max(dp[x[i]], max(dp[j]+1, dp[x[i]/j]+1));
    }
    ans = max(ans, dp[x[i]]);
  }
  cout << ans << endl;

  return 0;
}