func_code_string: #include <bits/stdc++.h>   #pragma GCC optimize( O3 )   #pragma GCC target( sse4 )   using namespace std;   mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());   int64_t dr8[] = {1, 1, 0, -1, -1, -1, 0, 1};   int64_t dc8[] = {0, 1, 1, 1, 0, -1, -1, -1};   int64_t dr4[] = {1, 0, 0, -1};   int64_t dc4[] = {0, 1, -1, 0};   int32_t main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     int64_t i, n, j, m, k, l, t;     int64_t x;     cin >> x;     while (x--) {       cin >> n;       vector<int64_t> v(n);       for (i = 0; i < n; i++) cin >> v[i];       for (i = 0; i < n / 2; i++) {         k = v[i];         v[i] = v[n - 1 - i];         v[n - 1 - i] = k;       }       for (i = 0; i < n; i++) cout << v[i] <<    ;       cout << endl;     }   }   