func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     int t, n, a[1000000], i, j, b = 0, c = 0, e, f, g, h, m[1000000];     cin >> t;     for (i = 0; i < t; i++) {       cin >> n;       h = n;       for (j = 1; j <= n; j++) {         cin >> a[j];       }       sort(a + 1, a + n + 1);       for (j = 1; j <= n; j++) {         if (b == 0) {           m[j] = a[j - c];           b = 1;         } else {           m[j] = a[n - c];           b = 0;           c++;         }       }       for (j = n; j >= 1; j--) {         cout << m[j] <<    ;       }       cout << endl;       b = 0;       c = 0;     }   }   