answer.code: In member function ‘void k_basis::ins(vec, int)’:
answer.code:52:33: error: no match for ‘operator%’ (operand types are ‘vec’ and ‘int’)
   52 |                 pro[a]=v*(x%k+k)%k;
      |                        ~~~~~~~~~^~
      |                         |        |
      |                         vec      int
In file included from /usr/include/c++/13/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:166,
                 from answer.code:1:
/usr/include/c++/13/bits/valarray_after.h:409:5: note: candidate: ‘template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__modulus, typename _Dom1::value_type>::result_type> std::operator%(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)’
  409 |     _DEFINE_EXPR_BINARY_OPERATOR(%, struct std::__modulus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:409:5: note:   template argument deduction/substitution failed:
answer.code:52:34: note:   ‘vec’ is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
   52 |                 pro[a]=v*(x%k+k)%k;
      |                                  ^
/usr/include/c++/13/bits/valarray_after.h:409:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__modulus, typename _Dom1::value_type>::result_type> std::operator%(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)’
  409 |     _DEFINE_EXPR_BINARY_OPERATOR(%, struct std::__modulus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:409:5: note:   template argument deduction/substitution failed:
answer.code:52:34: note:   ‘vec’ is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
   52 |                 pro[a]=v*(x%k+k)%k;
      |                                  ^
/usr/include/c++/13/bits/valarray_after.h:409:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__modulus, typename _Dom1::value_type>::result_type> std::operator%(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)’
  409 |     _DEFINE_EXPR_BINARY_OPERATOR(%, struct std::__modulus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:409:5: note:   template argument deduction/substitution failed:
answer.code:52:34: note:   mismatched types ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ and ‘int’
   52 |                 pro[a]=v*(x%k+k)%k;
      |                                  ^
/usr/include/c++/13/bits/valarray_after.h:409:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__modulus, typename _Dom1::value_type>::result_type> std::operator%(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)’
  409 |     _DEFINE_EXPR_BINARY_OPERATOR(%, struct std::__modulus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:409:5: note:   template argument deduction/substitution failed:
answer.code:52:34: note:   ‘vec’ is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
   52 |                 pro[a]=v*(x%k+k)%k;
      |                                  ^
/usr/include/c++/13/bits/valarray_after.h:409:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__modulus, typename _Dom1::value_type>::result_type> std::operator%(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)’
  409 |     _DEFINE_EXPR_BINARY_OPERATOR(%, struct std::__modulus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:409:5: note:   template argument deduction/substitution failed:
answer.code:52:34: note:   mismatched types ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ and ‘int’
   52 |                 pro[a]=v*(x%k+k)%k;
      |                                  ^
/usr/include/c++/13/valarray:1194:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__modulus, _Tp>::result_type> std::operator%(const valarray<_Tp>&, const valarray<_Tp>&)’
 1194 | _DEFINE_BINARY_OPERATOR(%, __modulus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/valarray:1194:1: note:   template argument deduction/substitution failed:
answer.code:52:34: note:   ‘vec’ is not derived from ‘const std::valarray<_Tp>’
   52 |   ...