func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     int tt = 1;     cin >> tt;     while (tt--) {       int n;       cin >> n;       int A[n];       for (int i = 0; i < n; i++) {         cin >> A[i];       }       int cnt = 0;       sort(A, A + n);       int left, right;       if (n % 2 == 0) {         left = n / 2 - 1;         right = n / 2;       } else {         left = n / 2;         right = n / 2 + 1;       }       while (cnt < n) {         cout << A[left] <<    ;         left--;         cnt++;         if (cnt == n) {           break;         }         cout << A[right] <<    ;         right++;         cnt++;       }       cout <<   n ;     }     return 0;   }   