answer.code: In function ‘void solve()’:
answer.code:9:5: error: ‘cin’ was not declared in this scope
    9 |     cin >> n;
      |     ^~~
answer.code:10:9: error: ‘i’ was not declared in this scope
   10 |     rep(i, 0, n) {
      |         ^
answer.code:10:5: error: ‘rep’ was not declared in this scope; did you mean ‘rp’?
   10 |     rep(i, 0, n) {
      |     ^~~
      |     rp
answer.code:17:5: error: ‘ll’ was not declared in this scope
   17 |     ll ans = 0;
      |     ^~
answer.code:19:9: error: ‘pi’ was not declared in this scope
   19 |     rep(pi, 1, n+1) {
      |         ^~
answer.code:44:5: error: ‘cout’ was not declared in this scope
   44 |     cout << ans << '\n';
      |     ^~~~
answer.code:44:13: error: ‘ans’ was not declared in this scope
   44 |     cout << ans << '\n';
      |             ^~~
answer.code: At global scope:
answer.code:47:1: error: ‘uci’ does not name a type
   47 | uci main() {
      | ^~~