func_code_string: #include <bits/stdc++.h>   using namespace std;   const int mxprime = 2750131;   int prime[mxprime + 1], res;   int func(int n) {     for (int i = 2; i * i <= n; i++)       if (n % i == 0) return n / i;   }   vector<int> ord(mxprime, false);   int vc[500001];   int main() {     int n;     cin >> n;     prime[1] = true;     map<int, int> mp;     for (int i = 2; i * i <= mxprime; i++) {       if (!prime[i]) {         for (int j = i * i; j <= mxprime; j += i) {           prime[j] = true;         }       }     }     for (int i = 2; i <= mxprime; i++) {       if (!prime[i]) {         ord[i] = ++res;       }     }     vector<int> a;     n = n * 2;     for (int i = 1; i <= n; i++) {       cin >> vc[i];       mp[vc[i]]++;     }     sort(vc + 1, vc + n + 1, greater<int>());     for (int i = 1; i <= n; i++) {       if (!mp[vc[i]]) continue;       if (!prime[vc[i]]) {         a.push_back(ord[vc[i]]);         mp[ord[vc[i]]]--;       } else {         a.push_back(vc[i]);         mp[func(vc[i])]--;       }       mp[vc[i]]--;     }     for (int i = 0; i < a.size(); i++) {       cout << a[i] <<    ;     }   }   