Language: C++

#include<bits/stdc++.h>
#define ll long long int
using namespace std;
int n, a[16], p[16][16], q[16][16], ans;
int main()
{
   cin>>n;
   for(int i = 0; i < n; i++)
   {
   	cin >> a[i];
   	for(int j = 0; j < a[i] ; j++)
   	{
   		cin >> p[i][j] >> q[i][j];
   		p[i][j]--;
   	}
   }
   for(int i = 0; i < (1<<n) ; i++)
   {
   	  bool ok = true;
   	  ll cnt = 0;
   	  for(int j=0; j < n; j++)
   	  {
            if((1ll << j) & i)
            {
            	cnt++;
            	for(int k = 0; k < a[j]; k++)
            	{
            		if ((((1ll << x[j][k]) & i) and !y[j][k]) or ((!((1ll << x[j][k]) & i) and y[j][k])))ok = false;
            	}
            }
   	  }
   	  if(ok)ans = max(ans,cnt);
   }
   cout << ans << "\n";
}


Compiler output:
a.cc: In function 'int main()':
a.cc:28:39: error: 'x' was not declared in this scope
   28 |                         if ((((1ll << x[j][k]) & i) and !y[j][k]) or ((!((1ll << x[j][k]) & i) and y[j][k])))ok = false;
      |                                       ^
a.cc:28:58: error: 'y' was not declared in this scope
   28 |                         if ((((1ll << x[j][k]) & i) and !y[j][k]) or ((!((1ll << x[j][k]) & i) and y[j][k])))ok = false;
      |                                                          ^
a.cc:32:26: error: no matching function for call to 'max(int&, long long int&)'
   32 |           if(ok)ans = max(ans,cnt);
      |                       ~~~^~~~~~~~~
In file included 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_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:32:26: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   32 |           if(ok)ans = max(ans,cnt);
      |                       ~~~^~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:32:26: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   32 |           if(ok)ans = max(ans,cnt);
      |                       ~~~^~~~~~~~~