#include "bits/stdc++.h" using namespace std; typedef long long ll; typedef pair pii; typedef pair pll; const int INF = 1e9; const ll LINF = 1e18; template ostream& operator << (ostream& out,const pair& o){ out << "(" << o.first << "," << o.second << ")"; return out; } template ostream& operator << (ostream& out,const vector& V){ for(int i = 0; i < V.size(); i++){ out << V[i]; if(i!=V.size()-1) out << " ";} return out; } template ostream& operator << (ostream& out,const vector >& Mat){ for(int i = 0; i < Mat.size(); i++) { if(i != 0) out << endl; out << Mat[i];} return out; } template ostream& operator << (ostream& out,const map& mp){ out << "{ "; for(auto it = mp.begin(); it != mp.end(); it++){ out << it->first << ":" << it->second; if(mp.size()-1 != distance(mp.begin(),it)) out << ", "; } out << " }"; return out; } templatevector make_v(size_t a){return vector(a);} templateauto make_v(size_t a,Ts... ts){return vector(ts...))>(a,make_v(ts...));} template typename enable_if::value==0>::type fill_v(T &t,const V &v){t=v;} template typename enable_if::value!=0>::type fill_v(T &t,const V &v){for(auto &e:t) fill_v(e,v);} /* 問題文============================================================ ================================================================= 解説============================================================= ================================================================ */ // nの約数を列挙する vector getdivisor(ll n){ vector res; for(ll i = 1; i*i <= n;i++){ if(n%i == 0) { res.push_back(i); if(n/i != i) res.push_back(n/i); } } sort(res.begin(),res.end()); return res; } ll Cnt[333333]; template Type solve(Type res = Type()){ ll N; cin >> N; vector A(N); for(auto& in:A) cin >> in; // vector> Divisors(N); // for(int i = 0; i < N;i++){ // Divisors[i] = getdivisor(A[i]); // } for(int i = 0; i < N;i++){ if(A[i] == 1){ Cnt[1] = 1; res = max(res,1LL); continue; } auto divisor = getdivisor(A[i]); ll& ref = Cnt[A[i]]; for(int j = 0; j < divisor.size()-1; j++){ ref = max(ref,Cnt[divisor[j]]+1); } res = max(res,ref); } return res; } int main(void) { cin.tie(0); ios::sync_with_stdio(false); //solve(0); cout << fixed << setprecision(12) << solve() << endl; return 0; }