Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
ll n,k;
ll fx(ll x,vector<ll> &a)
{
	ll sum=0;
	for(ll i=0;i<(ll)a.size();i++)
	sum+=a[i]^x;
	return sum;
}
int main()
{
	ll n,k;
	cin>>n>>k;
	vector<ll> a(n);
	vector<int> bit_nums(64);
	vector<int> x_vec(64);
	for(int i=0;i<n;i++)
	cin>>a[i];
	for(ll i=1;i<=ll(a.size());i++)
	{
		ll t=0;
		for(ll i=0;i<64;i++)
		{
			t=a>>i;
			bit_nums[i]+=(int)(t&1);
		}
	}
	for(int i=0;i<64;i++)
	{
		if(n%2!=0)
		{
			if(bit_nums[i]>(n/2)) x_vec[i]=0; else x_vec[i]=1;
		}
		else
		{
			if(bit_nums[i]>=(n/2)) x_vec[i]=0; else x_vec[i]=1;
		}
	}
	ll x=0;
	for(int i=62;i>=0;i--)
	{
		ll temp=x;
		temp+=x_vec[i]*((ll)1<<i);
		if (temp>k) continue; else x=temp;
	}
	ll ans=fx(x,a);
	cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:28: error: no match for 'operator>>' (operand types are 'std::vector<long long int>' and 'll' {aka 'long long int'})
   26 |                         t=a>>i;
      |                           ~^~~
      |                           |  |
      |                           |  ll {aka long long int}
      |                           std::vector<long long int>
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:41,
                 from a.cc:1:
/usr/include/c++/14/cstddef:131:5: note: candidate: 'template<class _IntegerType> constexpr std::__byte_op_t<_IntegerType> std::operator>>(byte, _IntegerType)'
  131 |     operator>>(byte __b, _IntegerType __shift) noexcept
      |     ^~~~~~~~
/usr/include/c++/14/cstddef:131:5: note:   template argument deduction/substitution failed:
a.cc:26:27: note:   cannot convert 'a' (type 'std::vector<long long int>') to type 'std::byte'
   26 |                         t=a>>i;
      |                           ^
In file included from /usr/include/c++/14/string:55,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/bits/basic_string.tcc:835:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
  835 |     operator>>(basic_istream<_CharT, _Traits>& __in,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.tcc:835:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<_CharT, _Traits>'
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/bitset:1597:5: note: candidate: 'template<class _CharT, class _Traits, long unsigned int _Nb> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, bitset<_Nb>&)'
 1597 |     operator>>(std::basic_istream<_CharT, _Traits>& __is, bitset<_Nb>& __x)
      |     ^~~~~~~~
/usr/include/c++/14/bitset:1597:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<_CharT, _Traits>'
   26 |                         t=a>>i;
      |                              ^
In file included from /usr/include/c++/14/istream:1109,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/bits/istream.tcc:978:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT&)'
  978 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
      |     ^~~~~~~~
/usr/include/c++/14/bits/istream.tcc:978:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<_CharT, _Traits>'
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/istream:849:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char&)'
  849 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c)
      |     ^~~~~~~~
/usr/include/c++/14/istream:849:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<char, _Traits>'
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/istream:854:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char&)'
  854 |     operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
      |     ^~~~~~~~
/usr/include/c++/14/istream:854:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<char, _Traits>'
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/istream:896:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT*)'
  896 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
      |     ^~~~~~~~
/usr/include/c++/14/istream:896:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<_CharT, _Traits>'
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/istream:939:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char*)'
  939 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char* __s)
      |     ^~~~~~~~
/usr/include/c++/14/istream:939:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<char, _Traits>'
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/istream:945:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char*)'
  945 |     operator>>(basic_istream<char, _Traits>& __in, signed char* __s)
      |     ^~~~~~~~
/usr/include/c++/14/istream:945:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<char, _Traits>'
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/istream:1099:5: note: candidate: 'template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&)'
 1099 |     operator>>(_Istream&& __is, _Tp&& __x)
      |     ^~~~~~~~
/usr/include/c++/14/istream:1099:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/istream: In substitution of 'template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&) [with _Istream = std::vector<long long int>&; _Tp = long long int&]':
a.cc:26:9:   required from here
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/istream:1099:5: error: no type named 'type' in 'struct std::enable_if<false, void>'
 1099 |     operator>>(_Istream&& __is, _Tp&& __x)
      |     ^~~~~~~~
/usr/include/c++/14/complex:509:5: note: candidate: 'template<class _Tp, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, complex<_Tp>&)'
  509 |     operator>>(basic_istream<_CharT, _Traits>& __is, complex<_Tp>& __x)
      |     ^~~~~~~~
/usr/include/c++/14/complex:509:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<_CharT, _Traits>'
   26 |                         t=a>>i;
      |                              ^
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:143:
/usr/include/c++/14/iomanip:76:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Resetiosflags)'
   76 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f)
      |     ^~~~~~~~
/usr/include/c++/14/iomanip:76:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<_CharT, _Traits>'
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/iomanip:106:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setiosflags)'
  106 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f)
      |     ^~~~~~~~
/usr/include/c++/14/iomanip:106:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<_CharT, _Traits>'
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/iomanip:137:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setbase)'
  137 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f)
      |     ^~~~~~~~
/usr/include/c++/14/iomanip:137:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<_CharT, _Traits>'
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/iomanip:177:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setfill<_CharT>)'
  177 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f)
      |     ^~~~~~~~
/usr/include/c++/14/iomanip:177:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derived from 'std::basic_istream<_CharT, _Traits>'
   26 |                         t=a>>i;
      |                              ^
/usr/include/c++/14/iomanip:207:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setprecision)'
  207 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f)
      |     ^~~~~~~~
/usr/include/c++/14/iomanip:207:5: note:   template argument deduction/substitution failed:
a.cc:26:30: note:   'std::vector<long long int>' is not derive