제출 #1311990

#제출 시각아이디문제언어결과실행 시간메모리
1311990nikoloz-ch은행 (IZhO14_bank)C++20
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> #define int int64_t using namespace std; void solve(){ int n, m; cin >> n >> m; vector<int> a(n), b(n); for(auto &i : a) cin >> i; for(auto &i : b) cin >> i; vector<vector<int>> sub; for(int i = 0; i < (1LL<<n); i++){ vector<int> cur; for(int j = 0; j < n; j++){ if(i & (1LL << j)){ cur.push_back(b[j]); } } sub.push_back(cur); } for(auto &i : sub){ int k = accumulate(sub.begin(),sub.end(),0); if(k == a[0]){ cout << "YES\n"; return; } } cout << "NO\n"; } signed main(){ cin.tie(0)->sync_with_stdio(0); int _; cin >> _; cout.tie(0); while(_--) solve(); }

컴파일 시 표준 에러 (stderr) 메시지

In file included from /usr/include/c++/13/numeric:62,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:58,
                 from bank.cpp:1:
/usr/include/c++/13/bits/stl_numeric.h: In instantiation of 'constexpr _Tp std::accumulate(_InputIterator, _InputIterator, _Tp) [with _InputIterator = __gnu_cxx::__normal_iterator<vector<long int>*, vector<vector<long int> > >; _Tp = int]':
bank.cpp:21:27:   required from here
/usr/include/c++/13/bits/stl_numeric.h:141:46: error: no match for 'operator+' (operand types are 'std::remove_reference<int&>::type' {aka 'int'} and 'std::vector<long int>')
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
In file included from /usr/include/c++/13/bits/stl_algobase.h:67,
                 from /usr/include/c++/13/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:51:
/usr/include/c++/13/bits/stl_iterator.h:634:5: note: candidate: 'template<class _Iterator> constexpr std::reverse_iterator<_IteratorL> std::operator+(typename reverse_iterator<_IteratorL>::difference_type, const reverse_iterator<_IteratorL>&)'
  634 |     operator+(typename reverse_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/13/bits/stl_iterator.h:634:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   'std::vector<long int>' is not derived from 'const std::reverse_iterator<_IteratorL>'
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/stl_iterator.h:1808:5: note: candidate: 'template<class _Iterator> constexpr std::move_iterator<_IteratorL> std::operator+(typename move_iterator<_IteratorL>::difference_type, const move_iterator<_IteratorL>&)'
 1808 |     operator+(typename move_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/13/bits/stl_iterator.h:1808:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   'std::vector<long int>' is not derived from 'const std::move_iterator<_IteratorL>'
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
In file included from /usr/include/c++/13/string:54,
                 from /usr/include/c++/13/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:52:
/usr/include/c++/13/bits/basic_string.h:3553:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3553 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3553:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/basic_string.h:3571:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3571 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3571:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const _CharT*' and 'int'
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/basic_string.h:3590:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3590 |     operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3590:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   'std::vector<long int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/basic_string.h:3607:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3607 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3607:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/basic_string.h:3625:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, _CharT)'
 3625 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3625:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/basic_string.h:3637:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3637 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3637:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/basic_string.h:3644:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3644 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3644:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/basic_string.h:3651:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3651 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3651:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/basic_string.h:3674:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3674 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3674:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const _CharT*' and 'int'
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/basic_string.h:3681:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3681 |     operator+(_CharT __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3681:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   'std::vector<long int>' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/basic_string.h:3688:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, const _CharT*)'
 3688 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3688:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/basic_string.h:3695:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> constexpr std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, _CharT)'
 3695 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3695:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
In file included from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:166:
/usr/include/c++/13/valarray:1196:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__plus, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__plus, _Tp>::result_type> std::operator+(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)'
 1196 | _DEFINE_BINARY_OPERATOR(+, __plus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/valarray:1196:1: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   'std::vector<long int>' is not derived from 'const std::valarray<_Tp>'
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/valarray:1196:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__plus, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__plus, _Tp>::result_type> std::operator+(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)'
 1196 | _DEFINE_BINARY_OPERATOR(+, __plus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/valarray:1196:1: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::valarray<_Tp>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/valarray:1196:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__plus, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__plus, _Tp>::result_type> std::operator+(const valarray<_Tp>&, const valarray<_Tp>&)'
 1196 | _DEFINE_BINARY_OPERATOR(+, __plus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/valarray:1196:1: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::valarray<_Tp>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
In file included from /usr/include/c++/13/valarray:605:
/usr/include/c++/13/bits/valarray_after.h:405:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__plus, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__plus, typename _Dom1::value_type>::result_type> std::operator+(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  405 |     _DEFINE_EXPR_BINARY_OPERATOR(+, struct std::__plus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:405:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   'std::vector<long int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/valarray_after.h:405:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__plus, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__plus, typename _Dom1::value_type>::result_type> std::operator+(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  405 |     _DEFINE_EXPR_BINARY_OPERATOR(+, struct std::__plus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:405:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/valarray_after.h:405:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__plus, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__plus, typename _Dom1::value_type>::result_type> std::operator+(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  405 |     _DEFINE_EXPR_BINARY_OPERATOR(+, struct std::__plus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:405:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   'std::vector<long int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/valarray_after.h:405:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__plus, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__plus, typename _Dom1::value_type>::result_type> std::operator+(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  405 |     _DEFINE_EXPR_BINARY_OPERATOR(+, struct std::__plus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:405:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/bits/valarray_after.h:405:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__plus, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__plus, typename _Dom1::value_type>::result_type> std::operator+(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  405 |     _DEFINE_EXPR_BINARY_OPERATOR(+, struct std::__plus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:405:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
In file included from /usr/include/c++/13/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:127:
/usr/include/c++/13/complex:454:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator+(const complex<_Tp>&)'
  454 |     operator+(const complex<_Tp>& __x)
      |     ^~~~~~~~
/usr/include/c++/13/complex:454:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::complex<_Tp>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/complex:353:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator+(const _Tp&, const complex<_Tp>&)'
  353 |     operator+(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/13/complex:353:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   'std::vector<long int>' is not derived from 'const std::complex<_Tp>'
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/complex:344:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator+(const complex<_Tp>&, const _Tp&)'
  344 |     operator+(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~~~~~~
/usr/include/c++/13/complex:344:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::complex<_Tp>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^
/usr/include/c++/13/complex:335:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator+(const complex<_Tp>&, const complex<_Tp>&)'
  335 |     operator+(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/13/complex:335:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/bits/stl_numeric.h:141:46: note:   mismatched types 'const std::complex<_Tp>' and 'std::remove_reference<int&>::type' {aka 'int'}
  141 |         __init = _GLIBCXX_MOVE_IF_20(__init) + *__first;
      |                                              ^