In file included from /usr/include/c++/11/bits/hashtable.h:35,
                 from /usr/include/c++/11/unordered_map:46,
                 from /usr/include/c++/11/functional:61,
                 from /usr/include/c++/11/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from answer.code:1:
/usr/include/c++/11/bits/hashtable_policy.h: In instantiation of ‘std::__detail::_Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHash, _Unused, __cache_hash_code>::__hash_code std::__detail::_Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHash, _Unused, __cache_hash_code>::_M_hash_code(const _Key&) const [with _Key = __int128; _Value = std::pair<const __int128, __int128>; _ExtractKey = std::__detail::_Select1st; _Hash = std::hash<__int128>; _RangeHash = std::__detail::_Mod_range_hashing; _Unused = std::__detail::_Default_ranged_hash; bool __cache_hash_code = true; std::__detail::_Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHash, _Unused, __cache_hash_code>::__hash_code = long unsigned int]’:
/usr/include/c++/11/bits/hashtable_policy.h:728:45:   required from ‘std::__detail::_Map_base<_Key, _Pair, _Alloc, std::__detail::_Select1st, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits, true>::mapped_type& std::__detail::_Map_base<_Key, _Pair, _Alloc, std::__detail::_Select1st, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits, true>::operator[](std::__detail::_Map_base<_Key, _Pair, _Alloc, std::__detail::_Select1st, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits, true>::key_type&&) [with _Key = __int128; _Pair = std::pair<const __int128, __int128>; _Alloc = std::allocator<std::pair<const __int128, __int128> >; _Equal = std::equal_to<__int128>; _Hash = std::hash<__int128>; _RangeHash = std::__detail::_Mod_range_hashing; _Unused = std::__detail::_Default_ranged_hash; _RehashPolicy = std::__detail::_Prime_rehash_policy; _Traits = std::__detail::_Hashtable_traits<true, false, true>; std::__detail::_Map_base<_Key, _Pair, _Alloc, std::__detail::_Select1st, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits, true>::mapped_type = __int128; std::__detail::_Map_base<_Key, _Pair, _Alloc, std::__detail::_Select1st, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits, true>::key_type = __int128]’
/usr/include/c++/11/bits/unordered_map.h:984:20:   required from ‘std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type& std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::operator[](std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::key_type&&) [with _Key = __int128; _Tp = __int128; _Hash = std::hash<__int128>; _Pred = std::equal_to<__int128>; _Alloc = std::allocator<std::pair<const __int128, __int128> >; std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type = __int128; std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::key_type = __int128]’
answer.code:19:72:   required from here
/usr/include/c++/11/bits/hashtable_policy.h:1215:23: error: static assertion failed: hash function must be invocable with an argument of key type
 1215 |         static_assert(__is_invocable<const _Hash&, const _Key&>{},
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/11/bits/hashtable_policy.h:1215:23: note: ‘std::__is_invocable<const std::hash<__int128>&, const __int128&>{}’ evaluates to false
/usr/include/c++/11/bits/hashtable_policy.h:1217:25: error: no match for call to ‘(const std::hash<__int128>) (const __int128&)’
 1217 |         return _M_hash()(__k);
      |                ~~~~~~~~~^~~~~
In file included from /usr/include/c++/11/bits/alloc_traits.h:33,
                 from /usr/include/c++/11/ext/alloc_traits.h:34,
                 from /usr/include/c++/11/bits/basic_string.h:40,
                 from /usr/include/c++/11/string:55,
                 from /usr/include/c++/11/bits/locale_classes.h:40,
                 from /usr/include/c++/11/bits/ios_base.h:41,
                 from /usr/include/c++/11/ios:42,
                 from /usr/include/c++/11/istream:38,
                 from /usr/include/c++/11/sstream:38,
                 from /usr/include/c++/11/complex:45,
                 from /usr/include/c++/11/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54,
                 from answer.code:1:
/usr/include/c++/11/bits/stl_construct.h: In instantiation of ‘void std::_Construct(_Tp*, _Args&& ...) [with _Tp = std::unordered_map<__int128, __int128>; _Args = {}]’:
/usr/include/c++/11/bits/stl_uninitialized.h:579:18:   required from ‘static _ForwardIterator std::__uninitialized_default_n_1<_TrivialValueType>::__uninit_default_n(_ForwardIterator, _Size) [with _ForwardIterator = std::unordered_map<__int128, __int128>*; _Size = long unsigned int; bool _TrivialValueType = false]’
/usr/include/c++/11/bits/stl_uninitialized.h:640:20:   required from ‘_ForwardIte...