/in/p1.cpp: In function 'int main()':
/in/p1.cpp:75:42: error: no match for 'operator+' (operand types are 'std::vector<point>::iterator {aka __gnu_cxx::__normal_iterator<point*, std::vector<point> >}' and 'double(double) noexcept')
                     vec.erase(vec.begin()+j1);
                               ~~~~~~~~~~~^~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/stl_iterator.h:835:7: note: candidate: __gnu_cxx::__normal_iterator<_Iterator, _Container> __gnu_cxx::__normal_iterator<_Iterator, _Container>::operator+(__gnu_cxx::__normal_iterator<_Iterator, _Container>::difference_type) const [with _Iterator = point*; _Container = std::vector<point>; __gnu_cxx::__normal_iterator<_Iterator, _Container>::difference_type = long int] <near match>
       operator+(difference_type __n) const _GLIBCXX_NOEXCEPT
       ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:835:7: note:   conversion of argument 1 would be ill-formed:
/in/p1.cpp:75:43: error: invalid conversion from 'double (*)(double) noexcept' to '__gnu_cxx::__normal_iterator<point*, std::vector<point> >::difference_type {aka long int}' [-fpermissive]
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/stl_iterator.h:400:5: note: candidate: template<class _Iterator> constexpr std::reverse_iterator<_Iterator> std::operator+(typename std::reverse_iterator<_Iterator>::difference_type, const std::reverse_iterator<_Iterator>&)
     operator+(typename reverse_iterator<_Iterator>::difference_type __n,
     ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:400:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'double(double) noexcept'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/stl_iterator.h:1201:5: note: candidate: template<class _Iterator> constexpr std::move_iterator<_IteratorL> std::operator+(typename std::move_iterator<_IteratorL>::difference_type, const std::move_iterator<_IteratorL>&)
     operator+(typename move_iterator<_Iterator>::difference_type __n,
     ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:1201:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'double(double) noexcept'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5888:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5888:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   'std::vector<point>::iterator {aka __gnu_cxx::__normal_iterator<point*, std::vector<point> >}' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:53:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.tcc:1157:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const _CharT*, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator+(const _CharT* __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.tcc:1157:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   mismatched types 'const _CharT*' and '__gnu_cxx::__normal_iterator<point*, std::vector<point> >'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:53:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.tcc:1173:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(_CharT, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator+(_CharT __lhs, const basic_string<_CharT, _Traits, _Alloc>& __rhs)
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.tcc:1173:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'double(double) noexcept'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5925:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)
     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5925:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   'std::vector<point>::iterator {aka __gnu_cxx::__normal_iterator<point*, std::vector<point> >}' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5941:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, _CharT)
     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5941:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   'std::vector<point>::iterator {aka __gnu_cxx::__normal_iterator<point*, std::vector<point> >}' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5953:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5953:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   'std::vector<point>::iterator {aka __gnu_cxx::__normal_iterator<point*, std::vector<point> >}' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5959:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&)
     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5959:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   'std::vector<point>::iterator {aka __gnu_cxx::__normal_iterator<point*, std::vector<point> >}' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5965:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&)
     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5965:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   'std::vector<point>::iterator {aka __gnu_cxx::__normal_iterator<point*, std::vector<point> >}' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5977:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(const _CharT*, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&)
     operator+(const _CharT* __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5977:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   mismatched types 'const _CharT*' and '__gnu_cxx::__normal_iterator<point*, std::vector<point> >'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5983:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(_CharT, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&)
     operator+(_CharT __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5983:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'double(double) noexcept'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5989:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, const _CharT*)
     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5989:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   'std::vector<point>::iterator {aka __gnu_cxx::__normal_iterator<point*, std::vector<point> >}' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/string:52:0,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/basic_string.h:5995:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Alloc> std::operator+(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, _CharT)
     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:5995:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   'std::vector<point>::iterator {aka __gnu_cxx::__normal_iterator<point*, std::vector<point> >}' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
                     vec.erase(vec.begin()+j1);
                                           ^~
In file included from /usr/include/c++/7/vector:65:0,
                 from /in/sort.hpp:4,
                 from /in/p1.cpp:2:
/usr/include/c++/7/bits/stl_bvector.h:297:3: note: candidate: std::_Bit_iterator std::operator+(std::ptrdiff_t, const std::_Bit_iterator&)
   operator+(ptrdiff_t __n, const _Bit_iterator& __x)
   ^~~~~~~~
/usr/include/c++/7/bits/stl_bvector.h:297:3: note:   no known conversion for argument 1 from 'std::vector<point>::iterator {aka __gnu_cxx::__normal_iterator<point*, std::vector<point> >}' to 'std::ptrdiff_t {aka long int}'
/usr/include/c++/7/bits/stl_bvector.h:387:3: note: candidate: std::_Bit_const_iterator std::operator+(std::ptrdiff_t, const std::_Bit_const_iterator&)
   operator+(ptrdiff_t __n, const _Bit_const_iterator& __x)
   ^~~~~~~~
/usr/include/c++/7/bits/stl_bvector.h:387:3: note:   no known conversion for argument 1 from 'std::vector<point>::iterator {aka __gnu_cxx::__normal_iterator<point*, std::vector<point> >}' to 'std::ptrdiff_t {aka long int}'
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/p1.cpp:1:
/usr/include/c++/7/bits/stl_iterator.h:972:5: note: candidate: template<class _Iterator, class _Container> __gnu_cxx::__normal_iterator<_Iterator, _Container> __gnu_cxx::operator+(typename __gnu_cxx::__normal_iterator<_Iterator, _Container>::difference_type, const __gnu_cxx::__normal_iterator<_Iterator, _Container>&)
     operator+(typename __normal_iterator<_Iterator, _Container>::difference_type
     ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:972:5: note:   template argument deduction/substitution failed:
/in/p1.cpp:75:43: note:   mismatched types 'const __gnu_cxx::__normal_iterator<_Iterator, _Container>' and 'double(double) noexcept'
                     vec.erase(vec.begin()+j1);
                                           ^~
/in/p1.cpp:79:13: error: expected '(' before '}' token
             }
             ^