answer.code:7:59: error: ‘vector’ does not name a type
    7 | template <class T> ostream &operator<<(ostream &os, const vector<T> &as) { const int sz = as.size(); os << "["; for (int i = 0; i < sz; ++i) { if (i >= 256) { os << ", ..."; break; } if (i > 0) { os << ", "; } os << as[i]; } return os << "]"; }
      |                                                           ^~~~~~
answer.code:7:65: error: expected ‘,’ or ‘...’ before ‘<’ token
    7 | template <class T> ostream &operator<<(ostream &os, const vector<T> &as) { const int sz = as.size(); os << "["; for (int i = 0; i < sz; ++i) { if (i >= 256) { os << ", ..."; break; } if (i > 0) { os << ", "; } os << as[i]; } return os << "]"; }
      |                                                                 ^
answer.code: In function ‘std::ostream& operator<<(std::ostream&, int)’:
answer.code:7:91: error: ‘as’ was not declared in this scope; did you mean ‘os’?
    7 | template <class T> ostream &operator<<(ostream &os, const vector<T> &as) { const int sz = as.size(); os << "["; for (int i = 0; i < sz; ++i) { if (i >= 256) { os << ", ..."; break; } if (i > 0) { os << ", "; } os << as[i]; } return os << "]"; }
      |                                                                                           ^~
      |                                                                                           os
answer.code: At global scope:
answer.code:17:8: error: ‘vector’ was not declared in this scope
   17 | vector<vector<pair<int, int>>> parallelSort(int n) {
      |        ^~~~~~
answer.code:2:1: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
    1 | #include<iostream>
  +++ |+#include <vector>
    2 | using namespace std;
answer.code:17:8: error: ‘vector’ was not declared in this scope
   17 | vector<vector<pair<int, int>>> parallelSort(int n) {
      |        ^~~~~~
answer.code:17:8: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:17:8: error: ‘vector’ was not declared in this scope
answer.code:17:8: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:17:8: error: ‘vector’ was not declared in this scope
answer.code:17:8: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:17:8: error: ‘vector’ was not declared in this scope
answer.code:17:8: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:17:8: error: ‘vector’ was not declared in this scope
answer.code:17:8: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:17:8: error: ‘vector’ was not declared in this scope
answer.code:17:8: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:17:8: error: ‘vector’ was not declared in this scope
answer.code:17:8: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:17:8: error: ‘vector’ was not declared in this scope
answer.code:17:8: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:17:1: error: ‘vector’ does not name a type
   17 | vector<vector<pair<int, int>>> parallelSort(int n) {
      | ^~~~~~
answer.code:40:3: error: ‘vector’ does not name a type
   40 |   vector<X> xs;
      |   ^~~~~~
answer.code:41:3: error: ‘vector’ does not name a type
   41 |   vector<pair<Y, X>> yxs;
      |   ^~~~~~
answer.code:42:10: error: ‘vector’ was not declared in this scope
   42 |   vector<vector<Y>> yss;
      |          ^~~~~~
answer.code:42:10: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:42:10: error: ‘vector’ was not declared in this scope
answer.code:42:10: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:42:10: error: ‘vector’ was not declared in this scope
answer.code:42:10: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:42:10: error: ‘vector’ was not declared in this scope
answer.code:42:10: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:42:10: error: ‘vector’ was not declared in this scope
answer.code:42:10: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:42:10: error: ‘vector’ was not declared in this scope
answer.code:42:10: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:42:10: error: ‘vector’ was not declared in this scope
answer.code:42:10: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
answer.code:42:10: error: ‘vector’ was not declared in this scope
answer.code:42:10: note: ‘std::vector’ is defined in header ‘<vector>’; ...