answer.code:4:7: error: expected nested-name-specifier before ‘lll’
    4 | using lll = __int128;
      |       ^~~
answer.code:5:7: error: expected nested-name-specifier before ‘ll’
    5 | using ll  = long long;
      |       ^~
answer.code:6:7: error: expected nested-name-specifier before ‘ld’
    6 | using ld  = long double;
      |       ^~
answer.code:7:7: error: expected nested-name-specifier before ‘pii’
    7 | using pii = pair<long long , long long>;
      |       ^~~
answer.code:16:81: error: default template arguments may not be used in function templates without ‘-std=c++11’ or ‘-std=gnu++11’
   16 | template < typename T = int > istream& operator >> (istream &in, vector < T > &v) {for (auto &x : v) in >> x; return in;}
      |                                                                                 ^
answer.code: In function ‘std::istream& operator>>(std::istream&, std::vector<_Tp>&)’:
answer.code:16:95: error: ISO C++ forbids declaration of ‘x’ with no type [-fpermissive]
   16 | template < typename T = int > istream& operator >> (istream &in, vector < T > &v) {for (auto &x : v) in >> x; return in;}
      |                                                                                               ^
answer.code:16:99: warning: range-based ‘for’ loops only available with ‘-std=c++11’ or ‘-std=gnu++11’
   16 | template < typename T = int > istream& operator >> (istream &in, vector < T > &v) {for (auto &x : v) in >> x; return in;}
      |                                                                                                   ^
answer.code: At global scope:
answer.code:17:88: error: default template arguments may not be used in function templates without ‘-std=c++11’ or ‘-std=gnu++11’
   17 | template < typename T = int > ostream& operator << (ostream &out, const vector < T > &v) {for (const T &x : v) out << x << ' '; return out;}
      |                                                                                        ^
answer.code: In function ‘std::ostream& operator<<(std::ostream&, const std::vector<_Tp>&)’:
answer.code:17:109: warning: range-based ‘for’ loops only available with ‘-std=c++11’ or ‘-std=gnu++11’
   17 | template < typename T = int > ostream& operator << (ostream &out, const vector < T > &v) {for (const T &x : v) out << x << ' '; return out;}
      |                                                                                                             ^
answer.code: In function ‘int main()’:
answer.code:36:47: error: ‘nullptr’ was not declared in this scope
   36 |     ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
      |                                               ^~~~~~~