answer.code:353:26: error: ambiguating new declaration ‘template<class T> long long int sz(const T&)’
  353 | template <typename T> ll sz(const T &x) { return x.size(); }    //注意此时类型的定义
      |                          ^~
answer.code:102:26: note: old declaration ‘template<class T> long long int sz(const T&)’
  102 | template <typename T> ll sz(const T &x) { return x.size(); }    //注意此时类型的定义
      |                          ^~
answer.code:354:26: error: ambiguating new declaration ‘template<class T> long long int sl(const T&)’
  354 | template <typename T> ll sl(const T &x) { return x.length();}
      |                          ^~
answer.code:103:26: note: old declaration ‘template<class T> long long int sl(const T&)’
  103 | template <typename T> ll sl(const T &x) { return x.length();}
      |                          ^~
answer.code:355:41: error: ambiguating new declaration ‘template<class T, class S> bool chmax(T&, const S&)’
  355 | template <class T, class S> inline bool chmax(T &a, const S &b) { return (a < b ? a = b, 1 : 0); }
      |                                         ^~~~~
answer.code:104:41: note: old declaration ‘template<class T, class S> bool chmax(T&, const S&)’
  104 | template <class T, class S> inline bool chmax(T &a, const S &b) { return (a < b ? a = b, 1 : 0); }
      |                                         ^~~~~
answer.code:356:41: error: ambiguating new declaration ‘template<class T, class S> bool chmin(T&, const S&)’
  356 | template <class T, class S> inline bool chmin(T &a, const S &b) { return (a > b ? a = b, 1 : 0); }
      |                                         ^~~~~
answer.code:105:41: note: old declaration ‘template<class T, class S> bool chmin(T&, const S&)’
  105 | template <class T, class S> inline bool chmin(T &a, const S &b) { return (a > b ? a = b, 1 : 0); }
      |                                         ^~~~~
answer.code:357:28: error: ambiguating new declaration ‘template<class T> T sqr(T)’
  357 | template<class T> inline T sqr(T x) { return x * x;}
      |                            ^~~
answer.code:106:28: note: old declaration ‘template<class T> T sqr(T)’
  106 | template<class T> inline T sqr(T x) { return x * x;}
      |                            ^~~
answer.code:358:31: error: ambiguating new declaration ‘template<class T> void OUT(T)’
  358 | template<class T> inline void OUT(T x) {cout << x << "\n";}
      |                               ^~~
answer.code:107:31: note: old declaration ‘template<class T> void OUT(T)’
  107 | template<class T> inline void OUT(T x) {cout << x << "\n";}
      |                               ^~~
answer.code:367:9: error: redefinition of ‘std::mt19937 mrand’
  367 | mt19937 mrand(random_device{}());
      |         ^~~~~
answer.code:116:9: note: ‘std::mt19937 mrand’ previously declared here
  116 | mt19937 mrand(random_device{}());
      |         ^~~~~
answer.code:384:11: error: ambiguating new declaration ‘template<class T> std::vector<_Tp> input_vector(T)’
  384 | vector<T> input_vector(T n) {   //注意要保证vector与n的类型完全相同
      |           ^~~~~~~~~~~~
answer.code:133:11: note: old declaration ‘template<class T> std::vector<_Tp> input_vector(T)’
  133 | vector<T> input_vector(T n) {   //注意要保证vector与n的类型完全相同
      |           ^~~~~~~~~~~~
answer.code:391:6: error: ambiguating new declaration ‘template<class t> void print_single(t, long long int)’
  391 | void print_single(t x, ll suc = 1) {
      |      ^~~~~~~~~~~~
answer.code:140:6: note: old declaration ‘template<class t> void print_single(t, long long int)’
  140 | void print_single(t x, ll suc = 1) {
      |      ^~~~~~~~~~~~
answer.code:399:6: error: ambiguating new declaration ‘template<class T> void print_single(const std::vector<_Tp>&, long long int)’
  399 | void print_single(const vector<T>&v, ll suc = 1) {
      |      ^~~~~~~~~~~~
answer.code:148:6: note: old declaration ‘template<class T> void print_single(const std::vector<_Tp>&, long long int)’
  148 | void print_single(const vector<T>&v, ll suc = 1) {
      |      ^~~~~~~~~~~~
answer.code:404:6: error: ambiguating new declaration ‘template<class T> void output_vector(const std::vector<_Tp>&, long long int)’
  404 | void output_vector(const vector<T>&v, ll suc = 1) {
      |      ^~~~~~~~~~~~~
answer.code:153:6: note: old declaration ‘template<class T> void output_vector(const std::vector<_Tp>&, long long int)’
  153 | void output_vector(const vector<T>&v, ll suc = 1) {
      |      ^~~~~~~~~~~~~
answer.code:409:6: error: ambiguating new declaration ‘template<class T> void change_output_vector(const std::vector<_Tp>&, long long int, long long int)’
  409 | void change_output_vector(const vector<T>&v, ll off, ll suc = 1) {
      |      ^~~~~~~~~~~~~~~~~~~~
answer.code:158:6: note: old declaration ‘template<class T> void change_output_vector(const std::vector<_Tp>&, long long int, long long int)’
  158 | void change_output_vector(const vector<T>&v, ll off, ll suc = 1) {
      |      ^~~~~~~~~~~~~~~~~~~~
answer.code...