answer.code: In function ‘int main()’:
answer.code:42:10: error: ‘vector’ is not a member of ‘std’
   42 |     std::vector< std::pair<int, int> > vI, vC, vP;
      |          ^~~~~~
answer.code:3:1: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
    2 | #include <algorithm>
  +++ |+#include <vector>
    3 | 
answer.code:42:38: error: expected primary-expression before ‘>’ token
   42 |     std::vector< std::pair<int, int> > vI, vC, vP;
      |                                      ^
answer.code:42:40: error: ‘vI’ was not declared in this scope; did you mean ‘I’?
   42 |     std::vector< std::pair<int, int> > vI, vC, vP;
      |                                        ^~
      |                                        I
answer.code:42:44: error: ‘vC’ was not declared in this scope; did you mean ‘C’?
   42 |     std::vector< std::pair<int, int> > vI, vC, vP;
      |                                            ^~
      |                                            C
answer.code:42:48: error: ‘vP’ was not declared in this scope; did you mean ‘P’?
   42 |     std::vector< std::pair<int, int> > vI, vC, vP;
      |                                                ^~
      |                                                P
answer.code:61:35: error: ‘vector’ in namespace ‘std’ does not name a template type
   61 |     auto idx_of = [&] (const std::vector< std::pair<int, int> > &v, int a, int b) {
      |                                   ^~~~~~
answer.code:61:30: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
   61 |     auto idx_of = [&] (const std::vector< std::pair<int, int> > &v, int a, int b) {
      |                              ^~~
answer.code:63:6: error: expected ‘)’ before ‘;’ token
   63 |     };
      |      ^
      |      )
answer.code:61:23: note: to match this ‘(’
   61 |     auto idx_of = [&] (const std::vector< std::pair<int, int> > &v, int a, int b) {
      |                       ^
answer.code: In lambda function:
answer.code:63:6: error: expected ‘{’ before ‘;’ token
   63 |     };
      |      ^
answer.code: In function ‘int main()’:
answer.code:75:29: error: ‘edI’ was not declared in this scope
   75 |         val += trI.sum(bgI, edI);
      |                             ^~~
answer.code:77:29: error: ‘edC’ was not declared in this scope
   77 |         val += trC.sum(bgC, edC);
      |                             ^~~
answer.code:79:29: error: ‘edP’ was not declared in this scope
   79 |         val += trP.sum(bgP, edP);
      |                             ^~~