Submission #276951

#TimeUsernameProblemLanguageResultExecution timeMemory
276951ElyesChaabouniPaint By Numbers (IOI16_paint)C++14
Compilation error
0 ms0 KiB
/*#pragma GCC optimize("O3")*/ #include<bits/stdc++.h> #include "paint.h" //#include <ext/pb_ds/assoc_container.hpp> //#include <ext/pb_ds/tree_policy.hpp> //#define ordered_set tree<int, null_type,less<int >, rb_tree_tag,tree_order_statistics_node_update> #define eps 1e-9 #define MOD1 998244353 #define MOD2 1000000007 #define INV_10 299473306 #define INF 1000000000 #define PI 3.14159265358979323846 using namespace std; string solve_puzzle(string s, vector<int> c) { int n=s.length(), k=c.size(); int pr[n+1]; for(int i = 0;i < n+1; i++) pr[i]=0; for(int i = s.length()-1; i >= 0; i--) { if(s[i]!='_') pr[i]=1; pr[i]+=pr[i+1]; } int dp[n+1][k+1]; for(int i = 0; i < n+1; i++) for(int j = 0; j < k+1; j++) dp[i][j]=0; for(int i = k-1; i >= 0; i--) dp[n][i]=1+dp[n][i+1]; for(int i = k-1; i >= 0; i--) { for(int j = n-1; j >= 0; j--) { if(j+c[i]-1 < n && s[j+c[i]-1]!='X' && (j==0 || s[j-1]!='X') && pr[j]-pr[j+c[i]]==0 && dp[j+c[i]][i+1] > 0) dp[j][i]=1; dp[j][i]+=dp[j+1][i]; } } for(int i = 1; i < k; i++) { int sum=0; for(int j = n-1; j >= 0; j--) { int x=dp[j][i]; dp[j][i]=dp[j+1][i]; if(x==sum+1) { sum++; if(j-1-c[i-1] >= 0 && dp[0][i-1]-dp[j-1-c[i-1]+1][i-1] > 0) dp[j][i]++; } } } for(int i = 0; i < n; i++) { bool done=0; if(s[i]=='.') { for(int j = 0; j < k && !done; j++) { int pos=max(0, i-c[j]+1); if(dp[pos][j]-dp[i+1][j] > 0) done=1; } if(!done) { s[i]='_'; } else { done=0; if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0) done=1; for(int j = 0; j < k-1 && !done; j++) { if(dp[0][j]-dp[max(i-c+2, 0)][j] > 0 && dp[i+1][j+1]-dp[n][j+1] > 0) done=1; } if(!done) { s[i]='X'; } else s[i]='?'; } } } return s; return ""; } //size

Compilation message (stderr)

paint.cpp: In function 'std::string solve_puzzle(std::string, std::vector<int>)':
paint.cpp:74:27: error: no match for 'operator-' (operand types are 'int' and 'std::vector<int>')
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                          ~^~
      |                          | |
      |                          | std::vector<int>
      |                          int
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from paint.cpp:2:
/usr/include/c++/9/bits/stl_iterator.h:415:5: note: candidate: 'template<class _IteratorL, class _IteratorR> decltype ((__y.base() - __x.base())) std::operator-(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)'
  415 |     operator-(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:415:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from paint.cpp:2:
/usr/include/c++/9/bits/stl_iterator.h:1212:5: note: candidate: 'template<class _IteratorL, class _IteratorR> decltype ((__x.base() - __y.base())) std::operator-(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)'
 1212 |     operator-(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:1212:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from paint.cpp:2:
/usr/include/c++/9/complex:357:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const std::complex<_Tp>&, const std::complex<_Tp>&)'
  357 |     operator-(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:357:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::complex<_Tp>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from paint.cpp:2:
/usr/include/c++/9/complex:366:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const std::complex<_Tp>&, const _Tp&)'
  366 |     operator-(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:366:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::complex<_Tp>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from paint.cpp:2:
/usr/include/c++/9/complex:375:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const _Tp&, const std::complex<_Tp>&)'
  375 |     operator-(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:375:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   'std::vector<int>' is not derived from 'const std::complex<_Tp>'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from paint.cpp:2:
/usr/include/c++/9/complex:452:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const std::complex<_Tp>&)'
  452 |     operator-(const complex<_Tp>& __x)
      |     ^~~~~~~~
/usr/include/c++/9/complex:452:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::complex<_Tp>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/deque:67,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:68,
                 from paint.cpp:2:
/usr/include/c++/9/bits/stl_deque.h:370:5: note: candidate: 'template<class _Tp, class _Ref, class _Ptr> typename std::_Deque_iterator<_Tp, _Ref, _Ptr>::difference_type std::operator-(const std::_Deque_iterator<_Tp, _Ref, _Ptr>&, const std::_Deque_iterator<_Tp, _Ref, _Ptr>&)'
  370 |     operator-(const _Deque_iterator<_Tp, _Ref, _Ptr>& __x,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_deque.h:370:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::_Deque_iterator<_Tp, _Ref, _Ptr>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/deque:67,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:68,
                 from paint.cpp:2:
/usr/include/c++/9/bits/stl_deque.h:382:5: note: candidate: 'template<class _Tp, class _RefL, class _PtrL, class _RefR, class _PtrR> typename std::_Deque_iterator<_Tp, _Ref, _Ptr>::difference_type std::operator-(const std::_Deque_iterator<_Tp, _Ref, _Ptr>&, const std::_Deque_iterator<_Tp, _RefR, _PtrR>&)'
  382 |     operator-(const _Deque_iterator<_Tp, _RefL, _PtrL>& __x,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_deque.h:382:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::_Deque_iterator<_Tp, _Ref, _Ptr>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/vector:68,
                 from /usr/include/c++/9/queue:61,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:86,
                 from paint.cpp:2:
/usr/include/c++/9/bits/stl_bvector.h:214:3: note: candidate: 'std::ptrdiff_t std::operator-(const std::_Bit_iterator_base&, const std::_Bit_iterator_base&)'
  214 |   operator-(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y)
      |   ^~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h:214:39: note:   no known conversion for argument 1 from 'int' to 'const std::_Bit_iterator_base&'
  214 |   operator-(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y)
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from paint.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, __minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from paint.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, __minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from paint.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, __minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   'std::vector<int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from paint.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, __minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from paint.cpp:2:
/usr/include/c++/9/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, __minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   'std::vector<int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from paint.cpp:2:
/usr/include/c++/9/valarray:1186:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const std::valarray<_Tp>&, const std::valarray<_Tp>&)'
 1186 | _DEFINE_BINARY_OPERATOR(-, __minus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/valarray:1186:1: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::valarray<_Tp>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from paint.cpp:2:
/usr/include/c++/9/valarray:1186:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const std::valarray<_Tp>&, const typename std::valarray<_Tp>::value_type&)'
 1186 | _DEFINE_BINARY_OPERATOR(-, __minus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/valarray:1186:1: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const std::valarray<_Tp>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:95,
                 from paint.cpp:2:
/usr/include/c++/9/valarray:1186:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const typename std::valarray<_Tp>::value_type&, const std::valarray<_Tp>&)'
 1186 | _DEFINE_BINARY_OPERATOR(-, __minus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/valarray:1186:1: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   'std::vector<int>' is not derived from 'const std::valarray<_Tp>'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from paint.cpp:2:
/usr/include/c++/9/bits/stl_iterator.h:977:5: note: candidate: 'template<class _IteratorL, class _IteratorR, class _Container> decltype ((__lhs.base() - __rhs.base())) __gnu_cxx::operator-(const __gnu_cxx::__normal_iterator<_IteratorL, _Container>&, const __gnu_cxx::__normal_iterator<_IteratorR, _Container>&)'
  977 |     operator-(const __normal_iterator<_IteratorL, _Container>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:977:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const __gnu_cxx::__normal_iterator<_IteratorL, _Container>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from paint.cpp:2:
/usr/include/c++/9/bits/stl_iterator.h:989:5: note: candidate: 'template<class _Iterator, class _Container> typename __gnu_cxx::__normal_iterator<_Iterator, _Container>::difference_type __gnu_cxx::operator-(const __gnu_cxx::__normal_iterator<_Iterator, _Container>&, const __gnu_cxx::__normal_iterator<_Iterator, _Container>&)'
  989 |     operator-(const __normal_iterator<_Iterator, _Container>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:989:5: note:   template argument deduction/substitution failed:
paint.cpp:74:28: note:   mismatched types 'const __gnu_cxx::__normal_iterator<_Iterator, _Container>' and 'int'
   74 |     if(dp[0][k-1]-dp[max(i-c+2, 0)][k-1] > 0 || dp[i+1][0]-dp[n][0] > 0)
      |                            ^
paint.cpp:78:26: error: no match for 'operator-' (operand types are 'int' and 'std::vector<int>')
   78 |      if(dp[0][j]-dp[max(i-c+2, 0)][j] > 0 && dp[i+1][j+1]-dp[n][j+1] > 0)
      |                         ~^~
      |                         | |
      |                         | std::vector<int>
      |                         int
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from paint.cpp:2:
/usr/include/c++/9/bits/stl_iterator.h:415:5: note: candidate: 'template<class _IteratorL, class _IteratorR> decltype ((__y.base() - __x.base())) std::operator-(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)'
  415 |     operator-(const reverse_iterator<_IteratorL>& __x,
      |