answer.code: In function ‘void qq()’:
answer.code:18:15: error: reference to ‘hash’ is ambiguous
   18 |     hv^=x,ch^=hash[x];
      |               ^~~~
In file included from /usr/include/c++/11/string_view:42,
                 from /usr/include/c++/11/bits/basic_string.h:48,
                 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/functional_hash.h:59:12: note: candidates are: ‘template<class _Tp> struct std::hash’
   59 |     struct hash;
      |            ^~~~
answer.code:13:5: note:                 ‘long long unsigned int hash [1000100]’
   13 | ull hash[N];
      |     ^~~~
answer.code:20:19: error: reference to ‘hash’ is ambiguous
   20 |     else if(hv<N&&hash[hv]==ch)cout<<hv<<endl;
      |                   ^~~~
In file included from /usr/include/c++/11/string_view:42,
                 from /usr/include/c++/11/bits/basic_string.h:48,
                 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/functional_hash.h:59:12: note: candidates are: ‘template<class _Tp> struct std::hash’
   59 |     struct hash;
      |            ^~~~
answer.code:13:5: note:                 ‘long long unsigned int hash [1000100]’
   13 | ull hash[N];
      |     ^~~~
answer.code: At global scope:
answer.code:23:1: error: two or more data types in declaration of ‘start’
   23 | void
      | ^~~~
answer.code: In function ‘void resume()’:
answer.code:32:8: error: no match for ‘operator<<’ (operand types are ‘std::istream’ {aka ‘std::basic_istream<char>’} and ‘int’)
   32 |     cin<<hv<<" "<<ch<<endl;
      |     ~~~^~~~
      |     |    |
      |     |    int
      |     std::istream {aka std::basic_istream<char>}
answer.code:32:8: note: candidate: ‘operator<<(int, int)’ (built-in)
   32 |     cin<<hv<<" "<<ch<<endl;
      |     ~~~^~~~
answer.code:32:8: note:   no known conversion for argument 1 from ‘std::istream’ {aka ‘std::basic_istream<char>’} to ‘int’
In file included from /usr/include/c++/11/regex:63,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:110,
                 from answer.code:1:
/usr/include/c++/11/bits/regex.h:1671:5: note: candidate: ‘template<class _Ch_type, class _Ch_traits, class _Bi_iter> std::basic_ostream<_CharT, _Traits>& std::__cxx11::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::sub_match<_Bi_iter>&)’
 1671 |     operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/11/bits/regex.h:1671:5: note:   template argument deduction/substitution failed:
answer.code:32:10: note:   ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
   32 |     cin<<hv<<" "<<ch<<endl;
      |          ^~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:45,
                 from answer.code:1:
/usr/include/c++/11/cstddef:126:5: note: candidate: ‘template<class _IntegerType> constexpr std::__byte_op_t<_IntegerType> std::operator<<(std::byte, _IntegerType)’
  126 |     operator<<(byte __b, _IntegerType __shift) noexcept
      |     ^~~~~~~~
/usr/include/c++/11/cstddef:126:5: note:   template argument deduction/substitution failed:
answer.code:32:5: note:   cannot convert ‘std::cin’ (type ‘std::istream’ {aka ‘std::basic_istream<char>’}) to type ‘std::byte’
   32 |     cin<<hv<<" "<<ch<<endl;
      |     ^~~
In file included from /usr/include/c++/11/bits/basic_string.h:48,
                 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:
...