/in/foo.cc: In function 'int main()':
/in/foo.cc:31:18: error: cannot convert 'std::vector<_Tp, _Alloc>::size<girl_add, std::allocator<girl_add> >' from type 'std::vector<girl_add>::size_type (std::vector<girl_add>::)() const noexcept {aka long unsigned int (std::vector<girl_add>::)() const noexcept}' to type 'int'
  int size = repo.size;
                  ^~~~