func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     vector<long long> v, ans;     long long n;     cin >> n;     for (long long i = 0; i < n; i++) {       long long q;       cin >> q;       v.push_back(q);     }     sort(v.begin(), v.end());     bool cur = 0;     while (!v.empty()) {       if (!cur) {         cout << v.front();         v.erase(v.begin());       } else {         cout << v.back();         v.erase(v.begin() + v.size() - 1);       }       cout <<    ;       cur = 1 - cur;     }   }   signed main() {     long long t = 1;     while (t--) solve();   }   