Submission #635205

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
635205	2022-08-25T16:30:53 Z	alvingogo	Jail (JOI22_jail)	C++14	Compilation error	0 ms	0 KB

jail

#include <bits/stdc++.h>
#define AquA cin.tie(0);ios_base::sync_with_stdio(0);
#define fs first
#define sc second
#define cd complex<double>
#define p_q priority_queue
using namespace std;

struct TOPO{
	vector<vector<int> > e;
	int n;
	vector<int> in;
	void init(int x){
		e.resize(x);
		in.resize(x);
		n=x;
	}
	void add(int x,int y){
		e[x].push_back(y);
		in[y]++;
	}
	bool solve(){
		int cnt=0;
		queue<int> q;
		for(int i=0;i<n;i++){
			if(in[i]==0){
				q.push(i);
			}
		}
		while(q.size()){
			int a=q.front();
			q.pop();
			cnt++;
			for(auto h:e[a]){
				in[h]--;
				if(in[h]==0){
					q.push(h);
				}
			}
		}
		return cnt==n;
	}
};
struct no{
	vector<int> ch;
	int dep=-1;
	int fa=-1;
	int as[18]={0};
	vector<int> s,t;
};
vector<no> v;
void dfs(int r,int f){
	v[r].dep=v[f].dep+1;
	v[r].as[0]=f;
	for(auto h:v[r].ch){
		if(h!=f){
			dfs(h,r);
		}
	}
}
void query(int r,int f,int cnt){
	for(int i=17;i>=0;i--){
		if(v[v[r].as[i]].dep>v[f].dep){
			add(cnt,m+18*n+18*r+i);
			add(m+18*r+i,cnt);
		}
	}
}
int main(){
	AquA;
	int q;
	cin >> q;
	while(q--){
		int n;
		cin >> n;
		v.clear();
		v.resize(n);
		for(int i=1;i<n;i++){
			int a,b;
			cin >> a >> b;
			a--;
			b--;
			v[a].ch.push_back(b);
			v[b].ch.push_back(a);
		}
		dfs(0,0);
		int m;
		cin >> m;
		vector<vector<int> > f(m);
		vector<pair<int,int> > g;
		vector<int> s(n),t(n);
		for(int i=0;i<m;i++){
			int a,b;
			cin >> a >> b;
			a--;
			b--;
			s[a]=i;
			t[b]=i;
			g.push_back({a,b});
		}
		TOPO tp;
		tp.init(m+36*n);
		for(int i=1;i<18;i++){
			for(int j=0;j<n;j++){
				v[j].as[i]=v[v[j].as[i-1]].as[i-1];
				tp.add(m+18*j+i-1,m+18*j+i);
				tp.add(m+18*v[j].as[i-1]+i-1,m+18*j+i);
				tp.add(m+18*n+18*j+i,m+18*n+18*j+i-1);
				tp.add(m+18*n+18*j+i,m+18*n+18*v[j].as[i-1]+i-1);
			}
		}
		int cnt=0;
		for(auto h:g){
			int a=h.fs,b=h.sc;
			int lca;
			if(v[a].dep>v[b].dep){
				for(int i=17;i>=0;i--){
					if(v[v[a].as[i]].dep>=v[b].dep){
						a=v[a].as[i];
					}
				}
			}
			if(v[b].dep>v[a].dep){
				for(int i=17;i>=0;i--){
					if(v[v[b].as[i]].dep>=v[b].dep){
						a=v[b].as[i];
					}
				}
			}
			if(a==b){
				lca=a;
			}
			else{
				while(a!=b){
					for(int i=17;i>=0;i--){
						if(v[v[b].as[i]]!=v[v[a].as[i]]){
							a=v[a].as[i];
							b=v[b].as[i];
						}
					}
				}
				lca=v[a].as[0];
			}
			add(cnt,t[a]);
			add(s[b],cnt);
			if(lca==a){
				b=v[b].as[0];
				query(b,a,cnt);
			}
			else if(lca==b){
				a=v[a].as[0];
				query(a,b,cnt);
			}
			else{
				a=v[a].as[0];
				b=v[a].as[0];
				query(a,lca,cnt);
				query(b,lca,cnt);
				add(cnt,t[lca]);
				add(s[lca],cnt);
				//ski :happy_mention:
			}
			cnt++;
		}
		if(tp.solve()){
			cout << "Yes\n";
		}
		else{
			cout << "No\n";
		}
	}
	return 0;
}

Compilation message

jail.cpp: In function 'void query(int, int, int)':
jail.cpp:64:12: error: 'm' was not declared in this scope
   64 |    add(cnt,m+18*n+18*r+i);
      |            ^
jail.cpp:64:17: error: 'n' was not declared in this scope
   64 |    add(cnt,m+18*n+18*r+i);
      |                 ^
jail.cpp:64:4: error: 'add' was not declared in this scope; did you mean 'fadd'?
   64 |    add(cnt,m+18*n+18*r+i);
      |    ^~~
      |    fadd
jail.cpp: In function 'int main()':
jail.cpp:136:23: error: no match for 'operator!=' (operand types are '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} and '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'})
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from jail.cpp:1:
/usr/include/c++/10/bits/regex.h:1064:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, const std::__cxx11::sub_match<_BiIter>&)'
 1064 |     operator!=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1064:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from jail.cpp:1:
/usr/include/c++/10/bits/regex.h:1144:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator!=(std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const std::__cxx11::sub_match<_BiIter>&)'
 1144 |     operator!=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1144:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from jail.cpp:1:
/usr/include/c++/10/bits/regex.h:1237:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)'
 1237 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1237:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from jail.cpp:1:
/usr/include/c++/10/bits/regex.h:1311:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const typename std::iterator_traits<_Iter>::value_type*, const std::__cxx11::sub_match<_BiIter>&)'
 1311 |     operator!=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1311:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from jail.cpp:1:
/usr/include/c++/10/bits/regex.h:1405:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1405 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1405:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from jail.cpp:1:
/usr/include/c++/10/bits/regex.h:1479:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const typename std::iterator_traits<_Iter>::value_type&, const std::__cxx11::sub_match<_BiIter>&)'
 1479 |     operator!=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1479:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from jail.cpp:1:
/usr/include/c++/10/bits/regex.h:1579:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1579 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1579:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from jail.cpp:1:
/usr/include/c++/10/bits/regex.h:2126:5: note: candidate: 'template<class _Bi_iter, class _Alloc> bool std::__cxx11::operator!=(const std::__cxx11::match_results<_BiIter, _Alloc>&, const std::__cxx11::match_results<_BiIter, _Alloc>&)'
 2126 |     operator!=(const match_results<_Bi_iter, _Alloc>& __m1,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:2126:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::__cxx11::match_results<_BiIter, _Alloc>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/iosfwd:40,
                 from /usr/include/c++/10/ios:38,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from jail.cpp:1:
/usr/include/c++/10/bits/postypes.h:227:5: note: candidate: 'template<class _StateT> bool std::operator!=(const std::fpos<_StateT>&, const std::fpos<_StateT>&)'
  227 |     operator!=(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/10/bits/postypes.h:227:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::fpos<_StateT>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from jail.cpp:1:
/usr/include/c++/10/bits/stl_pair.h:496:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator!=(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)'
  496 |     operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:496:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::pair<_T1, _T2>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:67,
                 from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from jail.cpp:1:
/usr/include/c++/10/bits/stl_iterator.h:372:5: note: candidate: 'template<class _Iterator> bool std::operator!=(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)'
  372 |     operator!=(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_iterator.h:372:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::reverse_iterator<_Iterator>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:67,
                 from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from jail.cpp:1:
/usr/include/c++/10/bits/stl_iterator.h:410:5: note: candidate: 'template<class _IteratorL, class _IteratorR> bool std::operator!=(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)'
  410 |     operator!=(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_iterator.h:410:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::reverse_iterator<_Iterator>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:67,
                 from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from jail.cpp:1:
/usr/include/c++/10/bits/stl_iterator.h:1444:5: note: candidate: 'template<class _IteratorL, class _IteratorR> bool std::operator!=(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)'
 1444 |     operator!=(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_iterator.h:1444:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::move_iterator<_IteratorL>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:67,
                 from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from jail.cpp:1:
/usr/include/c++/10/bits/stl_iterator.h:1501:5: note: candidate: 'template<class _Iterator> bool std::operator!=(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorL>&)'
 1501 |     operator!=(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_iterator.h:1501:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::move_iterator<_IteratorL>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/string:41,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from jail.cpp:1:
/usr/include/c++/10/bits/allocator.h:213:5: note: candidate: 'template<class _T1, class _T2> bool std::operator!=(const std::allocator<_CharT>&, const std::allocator<_T2>&)'
  213 |     operator!=(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/10/bits/allocator.h:213:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::allocator<_CharT>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/string:55,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from jail.cpp:1:
/usr/include/c++/10/bits/basic_string.h:6229:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator!=(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)'
 6229 |     operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/basic_string.h:6229:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   '__gnu_cxx::__alloc_traits<std::allocator<no>, no>::value_type' {aka 'no'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/string:55,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from jail.cpp:1:
/usr/include/c++/10/bits/basic_string.h:6242:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator!=(const _CharT*, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)'
 6242 |     operator!=(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/basic_string.h:6242:5: note:   template argument deduction/substitution failed:
jail.cpp:136:37: note:   mismatched types 'const _CharT*' and 'no'
  136 |       if(v[v[b].as[i]]!=v[v[a].as[i]]){
      |                                     ^
In file included from /usr/include/c++/10/string:55,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from jail.cpp:1:
/usr/include/c++/10/bits/basic_string.h:6254:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator!=(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)'
 6254 |     operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~