In file included from /in/driver/main.cpp:8:0:
/in/kdtree.hpp: In instantiation of 'KDTree<std::tuple<_Elements ...>, ValueType>::Node* KDTree<std::tuple<_Elements ...>, ValueType>::erase(KDTree<std::tuple<_Elements ...>, ValueType>::Node*, const Key&) [with long unsigned int DIM = 0; ValueType = std::__cxx11::basic_string<char>; KeyTypes = {int, int, int}; KDTree<std::tuple<_Elements ...>, ValueType>::Key = std::tuple<int, int, int>]':
/in/kdtree.hpp:616:17:   required from 'bool KDTree<std::tuple<_Elements ...>, ValueType>::erase(const Key&) [with ValueType = std::__cxx11::basic_string<char>; KeyTypes = {int, int, int}; KDTree<std::tuple<_Elements ...>, ValueType>::Key = std::tuple<int, int, int>]'
/in/driver/main.cpp:105:33:   required from here
/in/kdtree.hpp:384:26: error: unused variable 'DIM_NEXT' [-Werror=unused-variable]
         constexpr size_t DIM_NEXT = (DIM + 1) % KeySize;
                          ^~~~~~~~
/in/kdtree.hpp:382:40: error: unused parameter 'key' [-Werror=unused-parameter]
     Node *erase(Node *node, const Key &key)
                                        ^~~
cc1plus: all warnings being treated as errors