func_code_string: #include <bits/stdc++.h>   using namespace std;   int N, good;   bool prime[100010];   vector<int> fact, num, lis;   int main() {     memset(prime, true, sizeof(prime));     for (int i = 2; i * i <= 100000; i++)       if (prime[i])         for (int j = 2; i * j <= 100000; j++) prime[i * j] = false;     for (int i = 2; i <= 100000; i++)       if (prime[i]) {         num.push_back(i);         lis.push_back(0);       }     scanf( %d , &N);     while (N--) {       scanf( %d , &good);       int temp = good;       fact.clear();       int longest = 0;       for (int i = 0; i < num.size() && num[i] * num[i] <= good; i++)         if (good % num[i] == 0) {           fact.push_back(i);           longest = max(longest, lis[i] + 1);           while (temp % num[i] == 0) temp /= num[i];         }       if (temp > 1) {         int i = lower_bound(num.begin(), num.end(), temp) - num.begin();         fact.push_back(i);         longest = max(longest, lis[i] + 1);       }       for (int i = 0; i < fact.size(); i++)         lis[fact[i]] = max(lis[fact[i]], longest);     }     int ans = 1;     for (int i = 0; i < num.size(); i++) ans = max(ans, lis[i]);     printf( %d n , ans);     return 0;   }   