Submission #937147

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
937147	2024-03-03T14:26:15 Z	amirhoseinfar1385	Harbingers (CEOI09_harbingers)	C++17	Compilation error	0 ms	0 KB

harbingers

#include<bits/stdc++.h>
using namespace std;
const int maxn=100000+10;
long long inf=1e18,kaf=(1<<17);
struct func{
	func(){
		fas=shib=-inf;
	}
	long long fas,shib;
	long long inersect(func f){
		long long sor=fas-f.fas,makh=f.shib-shib;
		if(makh==0){
			if(sor>0){
				return -inf;
			}
			return inf;
		}
		if(makh<0){
			makh*=-1;
			sor*=-1;
		}
		if(sor<0){
			return sor/makh;
		}
		return (sor+makh-1)/makh;
	}
	bool operator <(const func f)const {
		return shib<f.shib;
	}
}fakefunc;
struct cht{
	vector<pair<long long,func>>st;
	void add(func f){
		while((int)st.size()>0){
			int x=f.inersect(st.back().second);
			if(x<=st.back().first){
				st.pop_back();
				continue;
			}else{
				st.push_back(make_pair(x,f));
				break;
			}
		}
		if((int)st.size()==0){
			st.push_back(make_pair(-inf,f));
		}
	}
	long long get(int x){
		int p=lower_bound(st.begin(),st.end(),make_pair(x+1,fakefunc))-st.begin()-1;
		if(p<0){
			return -inf;
		}
		////cout<<st.back().second.fas<<" "<<st.back().second.shib<<" "<<st.back().first<<endl;
		return st[p].second.fas+x*st[p].second.shib;
	}
};

struct segment{
	cht ch[(1<<18)];
	void upd(int i,int l,int r,int tl,int tr,func f){
		if(l>r||l>tr||r<tl||tl>tr){
			return ;
		}
		if(l>=tl&&r<=tr){
			ch[i].add(f);
			return ;
		}
		int m=(l+r)>>1;
		upd((i<<1),l,m,tl,tr,f);
		upd((i<<1)^1,m+1,r,tl,tr,f);
	}
	int pors(int x,int v){
		int ret=-inf;
		x+=kaf;
		while(x>0){
			ret=max(ret,ch[x].get(v));
			x>>=1;
		}
		return ret;
	}
}seg;

struct yal{
	int u,v,w;
	int getad(int fu){
		return (u^v^fu);
	}
}alle[maxn];
int n,timea=0,high[maxn],para[maxn];
long long dp[maxn];
pair<int,int>stf[maxn],all[maxn];
vector<int>adj[maxn];

void dfs(int u,int par=0,int len=0){
	timea++;
	para[u]=par;
	high[u]=len;
	stf[u].first=timea;
	for(auto x:adj[u]){
		int v=alle[x].getad(u);
		if(v!=par){
			dfs(v,u,len+alle[x].w);
		}
	}
	stf[u].second=timea;
}

void vorod(){
	cin>>n;
	for(int i=0;i<n-1;i++){
		cin>>alle[i].u>>alle[i].v>>alle[i].w;
		adj[alle[i].u].push_back(i);
		adj[alle[i].v].push_back(i);
	}
	for(int i=2;i<=n;i++){
		cin>>all[i].first>>all[i].second;
	}
}

void pre(){
	dfs(1);
}

void upd(int u){
	dp[u]=1ll*min(-seg.pors(stf[u].first,all[u].second),0ll)+all[u].first+1ll*all[u].second*high[u];
	func f;
	f.fas=-dp[u];
	f.shib=high[u];
	seg.upd(1,0,kaf-1,stf[u].first,stf[u].second,f);
}

void solve(int u=1){
	upd(u);
	for(auto x:adj[u]){
		int v=alle[x].getad(u);
		if(v!=para[u]){
			solve(v);
		}
	}
}

void khor(){
	for(int i=2;i<=n;i++){
		cout<<dp[i]<<" ";
	}
	cout<<"\n";
}
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	//cout.tie(0);
	//freopen("inp.txt","r",stdin);
	vorod();
	pre();
	solve();
	khor();
}

Compilation message

harbingers.cpp: In member function 'int segment::pors(int, int)':
harbingers.cpp:76:28: error: no matching function for call to 'max(int&, long long int)'
   76 |    ret=max(ret,ch[x].get(v));
      |                            ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:254:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  254 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:254:5: note:   template argument deduction/substitution failed:
harbingers.cpp:76:28: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   76 |    ret=max(ret,ch[x].get(v));
      |                            ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:300:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  300 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:300:5: note:   template argument deduction/substitution failed:
harbingers.cpp:76:28: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   76 |    ret=max(ret,ch[x].get(v));
      |                            ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3480:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)'
 3480 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3480:5: note:   template argument deduction/substitution failed:
harbingers.cpp:76:28: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   76 |    ret=max(ret,ch[x].get(v));
      |                            ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3486:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)'
 3486 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3486:5: note:   template argument deduction/substitution failed:
harbingers.cpp:76:28: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   76 |    ret=max(ret,ch[x].get(v));
      |                            ^
harbingers.cpp: In function 'void upd(int)':
harbingers.cpp:125:57: error: no matching function for call to 'min(int, long long int)'
  125 |  dp[u]=1ll*min(-seg.pors(stf[u].first,all[u].second),0ll)+all[u].first+1ll*all[u].second*high[u];
      |                                                         ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:230:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  230 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:230:5: note:   template argument deduction/substitution failed:
harbingers.cpp:125:57: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
  125 |  dp[u]=1ll*min(-seg.pors(stf[u].first,all[u].second),0ll)+all[u].first+1ll*all[u].second*high[u];
      |                                                         ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:278:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  278 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:278:5: note:   template argument deduction/substitution failed:
harbingers.cpp:125:57: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
  125 |  dp[u]=1ll*min(-seg.pors(stf[u].first,all[u].second),0ll)+all[u].first+1ll*all[u].second*high[u];
      |                                                         ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3468:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(std::initializer_list<_Tp>)'
 3468 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3468:5: note:   template argument deduction/substitution failed:
harbingers.cpp:125:57: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
  125 |  dp[u]=1ll*min(-seg.pors(stf[u].first,all[u].second),0ll)+all[u].first+1ll*all[u].second*high[u];
      |                                                         ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3474:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(std::initializer_list<_Tp>, _Compare)'
 3474 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3474:5: note:   template argument deduction/substitution failed:
harbingers.cpp:125:57: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
  125 |  dp[u]=1ll*min(-seg.pors(stf[u].first,all[u].second),0ll)+all[u].first+1ll*all[u].second*high[u];
      |                                                         ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:71,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Iter_less_val::operator()(_Iterator, _Value&) const [with _Iterator = __gnu_cxx::__normal_iterator<std::pair<long long int, func>*, std::vector<std::pair<long long int, func> > >; _Value = const std::pair<int, func>]':
/usr/include/c++/10/bits/stl_algobase.h:1324:14:   required from '_ForwardIterator std::__lower_bound(_ForwardIterator, _ForwardIterator, const _Tp&, _Compare) [with _ForwardIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, func>*, std::vector<std::pair<long long int, func> > >; _Tp = std::pair<int, func>; _Compare = __gnu_cxx::__ops::_Iter_less_val]'
/usr/include/c++/10/bits/stl_algobase.h:1359:32:   required from '_ForwardIterator std::lower_bound(_ForwardIterator, _ForwardIterator, const _Tp&) [with _ForwardIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, func>*, std::vector<std::pair<long long int, func> > >; _Tp = std::pair<int, func>]'
harbingers.cpp:49:64:   required from here
/usr/include/c++/10/bits/predefined_ops.h:67:22: error: no match for 'operator<' (operand types are 'std::pair<long long int, func>' and 'const std::pair<int, func>')
   67 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/10/bits/stl_algobase.h:67,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/stl_iterator.h:1096:5: note: candidate: 'template<class _IteratorL, class _IteratorR, class _Container> bool __gnu_cxx::operator<(const __gnu_cxx::__normal_iterator<_IteratorL, _Container>&, const __gnu_cxx::__normal_iterator<_IteratorR, _Container>&)'
 1096 |     operator<(const __normal_iterator<_IteratorL, _Container>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_iterator.h:1096:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/10/bits/stl_algobase.h:71,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/predefined_ops.h:67:22: note:   'std::pair<long long int, func>' is not derived from 'const __gnu_cxx::__normal_iterator<_IteratorL, _Container>'
   67 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/10/bits/stl_algobase.h:67,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/stl_iterator.h:1104:5: note: candidate: 'template<class _Iterator, class _Container> bool __gnu_cxx::operator<(const __gnu_cxx::__normal_iterator<_Iterator, _Container>&, const __gnu_cxx::__normal_iterator<_Iterator, _Container>&)'
 1104 |     operator<(const __normal_iterator<_Iterator, _Container>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_iterator.h:1104:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/10/bits/stl_algobase.h:71,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/predefined_ops.h:67:22: note:   'std::pair<long long int, func>' is not derived from 'const __gnu_cxx::__normal_iterator<_Iterator, _Container>'
   67 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/regex.h:1075:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator<(const std::__cxx11::sub_match<_BiIter>&, const std::__cxx11::sub_match<_BiIter>&)'
 1075 |     operator<(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1075:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/10/bits/stl_algobase.h:71,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/predefined_ops.h:67:22: note:   'std::pair<long long int, func>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   67 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/regex.h:1156:5: 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>&)'
 1156 |     operator<(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1156:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/10/bits/stl_algobase.h:71,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/predefined_ops.h:67:22: note:   'std::pair<long long int, func>' is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
   67 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/regex.h:1249:5: 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>&)'
 1249 |     operator<(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1249:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/10/bits/stl_algobase.h:71,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/predefined_ops.h:67:22: note:   'std::pair<long long int, func>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   67 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/regex.h:1323:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const typename std::iterator_traits<_Iter>::value_type*, const std::__cxx11::sub_match<_BiIter>&)'
 1323 |     operator<(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1323:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/10/bits/stl_algobase.h:71,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/predefined_ops.h:67:22: note:   'const std::pair<int, func>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   67 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/regex.h:1417:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1417 |     operator<(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1417:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/10/bits/stl_algobase.h:71,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/predefined_ops.h:67:22: note:   'std::pair<long long int, func>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   67 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/regex.h:1492:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const typename std::iterator_traits<_Iter>::value_type&, const std::__cxx11::sub_match<_BiIter>&)'
 1492 |     operator<(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1492:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/10/bits/stl_algobase.h:71,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/predefined_ops.h:67:22: note:   'const std::pair<int, func>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   67 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/regex.h:1592:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1592 |     operator<(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1592:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/10/bits/stl_algobase.h:71,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/predefined_ops.h:67:22: note:   'std::pair<long long int, func>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   67 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from harbingers.cpp:1:
/usr/include/c++/10/bits/stl_pair.h:489:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator<(const s