In file included from /in/driver/main.cpp:5:0:
/in/hashtable.hpp: In instantiation of 'bool HashTable<Key, Value, Hash, KeyEqual>::erase(const Key&) [with Key = int; Value = int; Hash = std::hash<int>; KeyEqual = std::equal_to<int>]':
/in/driver/main.cpp:120:35:   required from here
/in/hashtable.hpp:348:21: error: base operand of '->' has non-pointer type 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >'
                 if(!iterator->empty()){
                     ^~~~~~~~
/in/hashtable.hpp:349:40: error: no match for 'operator=' (operand types are 'std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > >::iterator {aka __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >}' and 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >')
                     this->firstBucketIt=iterator;
                     ~~~~~~~~~~~~~~~~~~~^~~~~~~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/driver/main.cpp:1:
/usr/include/c++/7/bits/stl_iterator.h:763:11: note: candidate: constexpr __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >& __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >::operator=(const __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&)
     class __normal_iterator
           ^~~~~~~~~~~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:763:11: note:   no known conversion for argument 1 from 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >' to 'const __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&'
/usr/include/c++/7/bits/stl_iterator.h:763:11: note: candidate: constexpr __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >& __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >::operator=(__gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&&)
/usr/include/c++/7/bits/stl_iterator.h:763:11: note:   no known conversion for argument 1 from 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >' to '__gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&&'
In file included from /in/driver/main.cpp:5:0:
/in/hashtable.hpp: In instantiation of 'Value& HashTable<Key, Value, Hash, KeyEqual>::operator[](const Key&) [with Key = int; Value = int; Hash = std::hash<int>; KeyEqual = std::equal_to<int>]':
/in/driver/main.cpp:129:94:   required from here
/in/hashtable.hpp:404:17: error: base operand of '->' has non-pointer type 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >'
             if(!iterator->empty()){
                 ^~~~~~~~
/in/hashtable.hpp:405:36: error: no match for 'operator=' (operand types are 'std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > >::iterator {aka __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >}' and 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >')
                 this->firstBucketIt=iterator;
                 ~~~~~~~~~~~~~~~~~~~^~~~~~~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/driver/main.cpp:1:
/usr/include/c++/7/bits/stl_iterator.h:763:11: note: candidate: constexpr __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >& __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >::operator=(const __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&)
     class __normal_iterator
           ^~~~~~~~~~~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:763:11: note:   no known conversion for argument 1 from 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >' to 'const __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&'
/usr/include/c++/7/bits/stl_iterator.h:763:11: note: candidate: constexpr __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >& __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >::operator=(__gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&&)
/usr/include/c++/7/bits/stl_iterator.h:763:11: note:   no known conversion for argument 1 from 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >' to '__gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&&'
In file included from /in/driver/main.cpp:5:0:
/in/hashtable.hpp: In instantiation of 'bool HashTable<Key, Value, Hash, KeyEqual>::insert(const HashTable<Key, Value, Hash, KeyEqual>::Iterator&, const Key&, const Value&) [with Key = int; Value = int; Hash = std::hash<int>; KeyEqual = std::equal_to<int>]':
/in/hashtable.hpp:330:22:   required from 'bool HashTable<Key, Value, Hash, KeyEqual>::insert(const Key&, const Value&) [with Key = int; Value = int; Hash = std::hash<int>; KeyEqual = std::equal_to<int>]'
/in/driver/main.cpp:111:43:   required from here
/in/hashtable.hpp:300:20: error: base operand of '->' has non-pointer type 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >'
                if(!iterator->empty()){
                    ^~~~~~~~
/in/hashtable.hpp:301:39: error: no match for 'operator=' (operand types are 'std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > >::iterator {aka __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >}' and 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >')
                    this->firstBucketIt=iterator;
                    ~~~~~~~~~~~~~~~~~~~^~~~~~~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/driver/main.cpp:1:
/usr/include/c++/7/bits/stl_iterator.h:763:11: note: candidate: constexpr __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >& __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >::operator=(const __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&)
     class __normal_iterator
           ^~~~~~~~~~~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:763:11: note:   no known conversion for argument 1 from 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >' to 'const __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&'
/usr/include/c++/7/bits/stl_iterator.h:763:11: note: candidate: constexpr __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >& __gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >::operator=(__gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&&)
/usr/include/c++/7/bits/stl_iterator.h:763:11: note:   no known conversion for argument 1 from 'std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >' to '__gnu_cxx::__normal_iterator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >*, std::vector<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > >, std::allocator<std::forward_list<std::pair<const int, int>, std::allocator<std::pair<const int, int> > > > > >&&'
In file included from /in/driver/main.cpp:5:0:
/in/hashtable.hpp:312:28: error: no match for 'operator+' (operand types are 'const ListIterator {aka const std::_Fwd_list_iterator<std::pair<const int, int> >}' and 'int')
            (it.listItBefore+1)->second = value;
            ~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/7/vector:65:0,
                 from /usr/include/c++/7/functional:61,
                 from /in/hashtable.hpp:4,
                 from /in/driver/main.cpp:5:
/usr/include/c++/7/bits/stl_bvector.h:387:3: note: candidate: std::_Bit_const_iterator std::operator+(std::ptrdiff_t, const std::_Bit_const_iterator&)
   operator+(ptrdiff_t __n, const _Bit_const_iterator& __x)
   ^~~~~~~~
/usr/include/c++/7/bits/stl_bvector.h:387:3: note:   no known conversion for argument 1 from 'const ListIterator {aka const std::_Fwd_list_iterator<std::pair<const int, int> >}' to 'std::ptrdiff_t {aka long int}'
/usr/include/c++/7/bits/stl_bvector.h:297:3: note: candidate: std::_Bit_iterator std::operator+(std::ptrdiff_t, const std::_Bit_iterator&)
   operator+(ptrdiff_t __n, const _Bit_iterator& __x)
   ^~~~~~~~
/usr/include/c++/7/bits/stl_bvector.h:297:3: note:   no known conversion for argument 1 from 'const ListIterator {aka const std::_Fwd_list_iterator<std::pair<const int, int> >}' to 'std::ptrdiff_t {aka long int}'
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/driver/main.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5995:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, _CharT)
     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5995:5: note:   template argument deduction/substitution failed:
In file included from /in/driver/main.cpp:5:0:
/in/hashtable.hpp:312:28: note:   types 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'const ListIterator {aka const std::_Fwd_list_iterator<std::pair<const int, int> >}' have incompatible cv-qualifiers
            (it.listItBefore+1)->second = value;
            ~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/driver/main.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5989:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, const _CharT*)
     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5989:5: note:   template argument deduction/substitution failed:
In file included from /in/driver/main.cpp:5:0:
/in/hashtable.hpp:312:28: note:   types 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'const ListIterator {aka const std::_Fwd_list_iterator<std::pair<const int, int> >}' have incompatible cv-qualifiers
            (it.listItBefore+1)->second = value;
            ~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/driver/main.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5983:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(_CharT, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&)
     operator+(_CharT __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5983:5: note:   template argument deduction/substitution failed:
In file included from /in/driver/main.cpp:5:0:
/in/hashtable.hpp:312:28: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'int'
            (it.listItBefore+1)->second = value;
            ~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/driver/main.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5977:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> s