In file included from /in/driver/main.cpp:8:0:
/in/kdtree.hpp: In member function 'void KDTree<std::tuple<_Elements ...>, ValueType>::Iterator::increment()':
/in/kdtree.hpp:82:18: error: 'cout' is not a member of 'std'
             std::cout << "increment" << std::endl;
                  ^~~~
/in/kdtree.hpp:82:18: note: suggested alternative: 'count'
             std::cout << "increment" << std::endl;
                  ^~~~
                  count
/in/kdtree.hpp:82:46: error: 'endl' is not a member of 'std'
             std::cout << "increment" << std::endl;
                                              ^~~~
/in/kdtree.hpp:82:46: note: suggested alternative: 'end'
             std::cout << "increment" << std::endl;
                                              ^~~~
                                              end