Language: C++

#include<bits/stdc++.h>
#define int long long
#define P pair<int,int>
#define PP pair<P,int>
#define F first
#define S second
#define f(i,n) for(int i=0;i<(n);i++)
#define INF LLONG_MAX/3
#define eps LDBL_EPSILON
#define mod (int)(1000000007)
#define pie 3.141592653589793238462643383279
#define Bpri priority_queue
#define Spri priority_queue<P,vector<P>,greater<P>>
using namespace std;
vector<int> v;
signed main(){
	int n,a,b;
	cin>>n;
	f(i,n){
		cin>>v[i];
	}
	sort(v.begin(),v.end());
	int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
	v.erase(v.begin()+0);
	v.erase(upper_bound(v.begin(),v.end(),v[0]));
	if(binary_search(v.begin(),v.end(),a^b)) c=a^b;
	v.erase(lower_bound(v.begin(),v.end(),a^b));
	f(i,n-3){
		if(i%3==0){
			if(binary_search(v.begin(),v.end(),a))v.erase(lower_bound(v.begin(),v.end(),a));
			else{
				puts("No");
				return 0;
			}
		}
		if(i%3==1){
			if(binary_search(v.begin(),v.end(),b))v.erase(lower_bound(v.begin(),v.end(),b));
			else{
				puts("No");
				return 0;
			}
		}
		if(i%3==2){
			if(binary_search(v.begin(),v.end(),c))v.erase(lower_bound(v.begin(),v.end(),c));
			else{
				puts("No");
				return 0;
			}
		}
	}
	if(n%3)puts("No");
	else puts("Yes");
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:13: error: redeclaration of 'long long int a'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |             ^
a.cc:17:15: note: 'long long int a' previously declared here
   17 |         int n,a,b;
      |               ^
a.cc:23:20: error: redeclaration of 'long long int b'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |                    ^
a.cc:17:17: note: 'long long int b' previously declared here
   17 |         int n,a,b;
      |                 ^
a.cc:23:59: error: no match for 'operator-' (operand types are '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' and 'std::vector<long long int>')
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
      |                                   |                        |
      |                                   |                        std::vector<long long int>
      |                                   __gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >
In file included from /usr/include/c++/14/bits/stl_algobase.h:67,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_iterator.h:1148:7: note: candidate: '__gnu_cxx::__normal_iterator<_Iterator, _Container> __gnu_cxx::__normal_iterator<_Iterator, _Container>::operator-(difference_type) const [with _Iterator = long long int*; _Container = std::vector<long long int>; difference_type = long int]'
 1148 |       operator-(difference_type __n) const _GLIBCXX_NOEXCEPT
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1148:33: note:   no known conversion for argument 1 from 'std::vector<long long int>' to '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >::difference_type' {aka 'long int'}
 1148 |       operator-(difference_type __n) const _GLIBCXX_NOEXCEPT
      |                 ~~~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_iterator.h:618:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__y.base() - __x.base())) std::operator-(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  618 |     operator-(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:618:5: note:   template argument deduction/substitution failed:
a.cc:23:60: note:   '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' is not derived from 'const std::reverse_iterator<_Iterator>'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |                                                            ^
/usr/include/c++/14/bits/stl_iterator.h:1790:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__x.base() - __y.base())) std::operator-(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1790 |     operator-(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1790:5: note:   template argument deduction/substitution failed:
a.cc:23:60: note:   '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' is not derived from 'const std::move_iterator<_IteratorL>'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |                                                            ^
In file included from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/complex:370:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&, const complex<_Tp>&)'
  370 |     operator-(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:370:5: note:   template argument deduction/substitution failed:
a.cc:23:60: note:   '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' is not derived from 'const std::complex<_Tp>'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |                                                            ^
/usr/include/c++/14/complex:379:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&, const _Tp&)'
  379 |     operator-(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:379:5: note:   template argument deduction/substitution failed:
a.cc:23:60: note:   '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' is not derived from 'const std::complex<_Tp>'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |                                                            ^
/usr/include/c++/14/complex:388:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const _Tp&, const complex<_Tp>&)'
  388 |     operator-(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:388:5: note:   template argument deduction/substitution failed:
a.cc:23:60: note:   'std::vector<long long int>' is not derived from 'const std::complex<_Tp>'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |                                                            ^
/usr/include/c++/14/complex:465:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&)'
  465 |     operator-(const complex<_Tp>& __x)
      |     ^~~~~~~~
/usr/include/c++/14/complex:465:5: note:   candidate expects 1 argument, 2 provided
In file included from /usr/include/c++/14/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166:
/usr/include/c++/14/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 _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:23:60: note:   '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |                                                            ^
/usr/include/c++/14/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 _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:23:60: note:   '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |                                                            ^
/usr/include/c++/14/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 _Expr<_Dom1, typename _Dom1::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:23:60: note:   'std::vector<long long int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |                                                            ^
/usr/include/c++/14/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 _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:23:60: note:   '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];
      |                                                            ^
/usr/include/c++/14/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 valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:23:60: note:   'std::vector<long long int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   23 |         int a=v[0],b=v[upper_bound(v.begin(),v.end(),v[0])-v];