func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e5 + 5;   int n, finans = 0;   int a[N], ans[N], sieve[N], countprime[N];   vector<int> primes[N];   int32_t main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     ;     cin >> n;     for (int i = 1; i <= n; i++) {       cin >> a[i];       ans[i] = 1;     }     for (int i = 2; i <= 1e5; i++) sieve[i] = 1;     for (int i = 2; i <= 1e5; i++) {       if (sieve[i]) {         for (int j = 1; i * j <= 1e5; j++) {           primes[i * j].push_back(i);           sieve[i * j] = 0;         }       }     }     for (int i = n; i >= 1; i--) {       for (auto it : primes[a[i]]) ans[i] = max(ans[i], countprime[it] + 1);       for (auto it : primes[a[i]]) countprime[it] = max(countprime[it], ans[i]);       finans = max(ans[i], finans);     }     cout << finans;   }   