func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[100000], s[100000];   void qs(int q, int w) {     int e = q, r = w, t = a[q + (rand() % (w - q + 1))], y;     do {       while (a[e] < t) e++;       while (a[r] > t) r--;       if (e <= r) {         y = a[e];         a[e] = a[r];         a[r] = y;         y = s[e];         s[e] = s[r];         s[r] = y;         e++;         r--;       }     } while (e <= r);     if (q < r) qs(q, r);     if (e < w) qs(e, w);   }   int main() {     int q, w, e, r, t;     cin >> q;     for (w = 0; w < q; w++) {       cin >> a[w];       s[w] = w + 1;     }     qs(0, q - 1);     cout << (q + 1) / 2 <<   n ;     for (w = 0; w < q; w += 2) cout << s[w] <<    ;     cout <<   n  << q / 2 <<   n ;     for (w = 1; w < q; w += 2) cout << s[w] <<    ;     return 0;   }   