Submission #287450

#TimeUsernameProblemLanguageResultExecution timeMemory
287450NamnamseoTeams (CEOI11_tea)C++17
Compilation error
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int,int> pp; void read(int& x){ scanf("%d",&x); } template<typename T,typename... Args> void read(T& a,Args&... b){ read(a); read(b...); } #define all(x) (x).begin(),(x).end() #define pb push_back const int max_n = int(1e6) + 10, inf = 1e9; typedef pair<int,int> pp; pp data[max_n]; int n; int dpTN[max_n]; int dpMX[max_n]; struct indi { int team_num; int max_size; int from; indi(int a=-1, int b=inf, int c=-1){ team_num = a; max_size = b; from = c; } bool operator<(const indi& r) const { return make_pair(team_num, -max_size) < make_pair(r.team_num, -r.max_size); } }; const int M =1048576; indi tree[M<<1]; indi tree_add[M<<1]; indi dp[max_n]; int bef[max_n]; indi getMax(indi* tree, int p){ indi ret; p+=M; while(p) ret=max(ret, tree[p]), p>>=1; return ret; } void upd(indi* tree, int l, int r, indi val){ l+=M; r+=M; while(l<=r){ if(l%2==1) tree[l]=max(tree[l], val), ++l; if(r%2==0) tree[r]=max(tree[r], val), --r; l>>=1; r>>=1; } } vector<vector<int>> ans; struct cmp { bool operator()(const int& a, const int& b){ return ans[a].size() > ans[b].size(); } }; priority_queue<int,vector<int>,cmp> PQ; int main() { read(n); for(int i=1; i<=n; ++i){ read(data[i].first); data[i].second=i; } sort(data+1, data+n+1, greater<pp>()); for(int i=0; i<=n; ++i){ indi v1 = getMax(tree, i); indi v2 = getMax(tree_add, i); v2.max_size += i; indi my = max(v1, v2); if(i == 0) my = indi(0, 0, -1); dp[i] = my; bef[i] = my.from; if(i == n) break; if(my.team_num == -1) continue; int tn = my.team_num; int mt = my.max_size; ll pt = tn * 1LL * mt; int mv=data[i+1].first; upd(tree, i+1, min(pt, ll(n)), indi(tn, mt, -i)); upd(tree, i+mv, min(i+mt-1, n), indi(tn+1, mt, i)); upd(tree_add, i+max(mv, mt), n, indi(tn+1, -i, i)); } printf("%d\n", dp[n].team_num); vector<pp> pend; int p=n; while(p){ int x=bef[p]; if(x < 0){ x=-x; for(int i=x+1; i<=p; ++i){ pend.pb(pp{int(ans.size()), data[i].second}); } } else { vector<int> v; for(int i=x+1; i<=p; ++i){ v.pb(data[i].second); } ans.pb(v); } p=x; } int an=ans.size(); for(int i=an-1; i>=0; --i){ PQ.push(i); while(pend.size()){ int x, y; tie(x, y) = pend.back(); if(x != i) break; pend.pop_back(); int p=PQ.top(); PQ.pop(); ans[p].pb(y); PQ.push(p); } } for(auto& tmp:ans){ printf("%d ", int(tmp.size())); for(int x:tmp) printf("%d ", x); putchar(10); } return 0; }

Compilation message (stderr)

tea.cpp: In function 'int main()':
tea.cpp:68:8: error: reference to 'data' is ambiguous
   68 |   read(data[i].first); data[i].second=i;
      |        ^~~~
In file included from /usr/include/c++/9/string:54,
                 from /usr/include/c++/9/bits/locale_classes.h:40,
                 from /usr/include/c++/9/bits/ios_base.h:41,
                 from /usr/include/c++/9/ios:42,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from tea.cpp:1:
/usr/include/c++/9/bits/range_access.h:318:5: note: candidates are: 'template<class _Tp> constexpr const _Tp* std::data(std::initializer_list<_Tp>)'
  318 |     data(initializer_list<_Tp> __il) noexcept
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:309:5: note:                 'template<class _Tp, long unsigned int _Nm> constexpr _Tp* std::data(_Tp (&)[_Nm])'
  309 |     data(_Tp (&__array)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:299:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(const _Container&)'
  299 |     data(const _Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:289:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(_Container&)'
  289 |     data(_Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
tea.cpp:14:4: note:                 'pp data [1000010]'
   14 | pp data[max_n];
      |    ^~~~
tea.cpp:68:24: error: reference to 'data' is ambiguous
   68 |   read(data[i].first); data[i].second=i;
      |                        ^~~~
In file included from /usr/include/c++/9/string:54,
                 from /usr/include/c++/9/bits/locale_classes.h:40,
                 from /usr/include/c++/9/bits/ios_base.h:41,
                 from /usr/include/c++/9/ios:42,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from tea.cpp:1:
/usr/include/c++/9/bits/range_access.h:318:5: note: candidates are: 'template<class _Tp> constexpr const _Tp* std::data(std::initializer_list<_Tp>)'
  318 |     data(initializer_list<_Tp> __il) noexcept
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:309:5: note:                 'template<class _Tp, long unsigned int _Nm> constexpr _Tp* std::data(_Tp (&)[_Nm])'
  309 |     data(_Tp (&__array)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:299:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(const _Container&)'
  299 |     data(const _Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:289:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(_Container&)'
  289 |     data(_Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
tea.cpp:14:4: note:                 'pp data [1000010]'
   14 | pp data[max_n];
      |    ^~~~
tea.cpp:70:10: error: reference to 'data' is ambiguous
   70 |     sort(data+1, data+n+1, greater<pp>());
      |          ^~~~
In file included from /usr/include/c++/9/string:54,
                 from /usr/include/c++/9/bits/locale_classes.h:40,
                 from /usr/include/c++/9/bits/ios_base.h:41,
                 from /usr/include/c++/9/ios:42,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from tea.cpp:1:
/usr/include/c++/9/bits/range_access.h:318:5: note: candidates are: 'template<class _Tp> constexpr const _Tp* std::data(std::initializer_list<_Tp>)'
  318 |     data(initializer_list<_Tp> __il) noexcept
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:309:5: note:                 'template<class _Tp, long unsigned int _Nm> constexpr _Tp* std::data(_Tp (&)[_Nm])'
  309 |     data(_Tp (&__array)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:299:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(const _Container&)'
  299 |     data(const _Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:289:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(_Container&)'
  289 |     data(_Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
tea.cpp:14:4: note:                 'pp data [1000010]'
   14 | pp data[max_n];
      |    ^~~~
tea.cpp:70:18: error: reference to 'data' is ambiguous
   70 |     sort(data+1, data+n+1, greater<pp>());
      |                  ^~~~
In file included from /usr/include/c++/9/string:54,
                 from /usr/include/c++/9/bits/locale_classes.h:40,
                 from /usr/include/c++/9/bits/ios_base.h:41,
                 from /usr/include/c++/9/ios:42,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from tea.cpp:1:
/usr/include/c++/9/bits/range_access.h:318:5: note: candidates are: 'template<class _Tp> constexpr const _Tp* std::data(std::initializer_list<_Tp>)'
  318 |     data(initializer_list<_Tp> __il) noexcept
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:309:5: note:                 'template<class _Tp, long unsigned int _Nm> constexpr _Tp* std::data(_Tp (&)[_Nm])'
  309 |     data(_Tp (&__array)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:299:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(const _Container&)'
  299 |     data(const _Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:289:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(_Container&)'
  289 |     data(_Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
tea.cpp:14:4: note:                 'pp data [1000010]'
   14 | pp data[max_n];
      |    ^~~~
tea.cpp:84:10: error: reference to 'data' is ambiguous
   84 |   int mv=data[i+1].first;
      |          ^~~~
In file included from /usr/include/c++/9/string:54,
                 from /usr/include/c++/9/bits/locale_classes.h:40,
                 from /usr/include/c++/9/bits/ios_base.h:41,
                 from /usr/include/c++/9/ios:42,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from tea.cpp:1:
/usr/include/c++/9/bits/range_access.h:318:5: note: candidates are: 'template<class _Tp> constexpr const _Tp* std::data(std::initializer_list<_Tp>)'
  318 |     data(initializer_list<_Tp> __il) noexcept
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:309:5: note:                 'template<class _Tp, long unsigned int _Nm> constexpr _Tp* std::data(_Tp (&)[_Nm])'
  309 |     data(_Tp (&__array)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:299:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(const _Container&)'
  299 |     data(const _Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
/usr/include/c++/9/bits/range_access.h:289:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(_Container&)'
  289 |     data(_Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
tea.cpp:14:4: note:                 'pp data [1000010]'
   14 | pp data[max_n];
      |    ^~~~
tea.cpp:99:47: error: no matching function for call to 'std::pair<int, int>::pair(<brace-enclosed initializer list>)'
   99 |     pend.pb(pp{int(ans.size()), data[i].second});
      |                                               ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/bits/specfun.h:45,
                 from /usr/include/c++/9/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:41,
                 from tea.cpp:1:
/usr/include/c++/9/bits/stl_pair.h:436:9: note: candidate: 'template<class ... _Args1, long unsigned int ..._Indexes1, class ... _Args2, long unsigned int ..._Indexes2> std::pair<_T1, _T2>::pair(std::tuple<_Args1 ...>&, std::tuple<_Args2 ...>&, std::_Index_tuple<_Indexes1 ...>, std::_Index_tuple<_Indexes2 ...>)'
  436 |         pair(tuple<_Args1...>&, tuple<_Args2...>&,
      |         ^~~~
/usr/include/c++/9/bits/stl_pair.h:436:9: note:   template argument deduction/substitution failed:
tea.cpp:99:47: note:   mismatched types 'std::tuple<_Tps ...>' and 'int'
   99 |     pend.pb(pp{int(ans.size()), data[i].second});
      |                                               ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/bits/specfun.h:45,
                 from /usr/include/c++/9/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:41,
                 from tea.cpp:1:
/usr/include/c++/9/bits/stl_pair.h:375:9: note: candidate: 'template<class ... _Args1, class ... _Args2> std::pair<_T1, _T2>::pair(std::piecewise_construct_t, std::tuple<_Args1 ...>, std::tuple<_Args2 ...>)'
  375 |         pair(piecewise_construct_t, tuple<_Args1...>, tuple<_Args2...>);
      |         ^~~~
/usr/include/c++/9/bits/stl_pair.h:375:9: note:   template argument deduction/substitution failed:
/usr/include/c++/9/bits/stl_pair.h:370:21: note: candidate: 'template<class _U1, class _U2, typename std::enable_if<(std::_PCC<((! std::is_same<int, _U1>::value) || (! std::is_same<int, _U2>::value)), int, int>::_MoveConstructiblePair<_U1, _U2>() && (! std::_PCC<((! std::is_same<int, _U1>::value) || (! std::is_same<int, _U2>::value)), int, int>::_ImplicitlyMoveConvertiblePair<_U1, _U2>())), bool>::type <anonymous> > constexpr std::pair<_T1, _T2>::pair(std::pair<_U1, _U2>&&)'
  370 |  explicit constexpr pair(pair<_U1, _U2>&& __p)
      |                     ^~~~
/usr/include/c++/9/bits/stl_pair.h:370:21: note:   template argument deduction/substitution failed:
tea.cpp:99:47: note:   mismatched types 'std::pair<_T1, _T2>' and 'int'
   99 |     pend.pb(pp{int(ans.size()), data[i].second});
      |                                               ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/bits/specfun.h:45,
                 from /usr/include/c++/9/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:41,
                 from tea.cpp:1:
/usr/include/c++/9/bits/stl_pair.h:360:12: note: candidate: 'template<class _U1, class _U2, typename std::enable_if<(std::_PCC<((! std::is_same<int, _U1>::value) || (! std::is_same<int, _U2>::value)), int, int>::_MoveConstructiblePair<_U1, _U2>() && std::_PCC<((! std::is_same<int, _U1>::value) || (! std::is_same<int, _U2>::value)), int, int>::_ImplicitlyMoveConvertiblePair<_U1, _U2>()), bool>::type <anonymous> > constexpr std::pair<_T1, _T2>::pair(std::pair<_U1, _U2>&&)'
  360 |  constexpr pair(pair<_U1, _U2>&& __p)
      |            ^~~~
/usr/include/c++/9/bits/stl_pair.h:360:12: note:   template argument deduction/substitution failed:
tea.cpp:99:47: note:   mismatched types 'std::pair<_T1, _T2>' and 'int'
   99 |     pend.pb(pp{int(ans.size()), data[i].second});
      |                                               ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/bits/specfun.h:45,
                 from /usr/include/c++/9/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:41,
                 from tea.cpp:1:
/usr/include/c++/9/bits/stl_pair.h:350:21: note: candidate: 'template<class _U1, class _U2, typename std::enable_if<(_MoveConstructiblePair<_U1, _U2>() && (! _ImplicitlyMoveConvertiblePair<_U1, _U2>())), bool>::type <anonymous> > constexpr std::pair<_T1, _T2>::pair(_U1&&, _U2&&)'
  350 |  explicit constexpr pair(_U1&& __x, _U2&& __y)
      |                     ^~~~
/usr/include/c++/9/bits/stl_pair.h:350:21: note:   template argument deduction/substitution failed:
/usr/include/c++/9/bits/stl_pair.h:341:12: note: candidate: 'template<class _U1, class _U2, typename std::enable_if<(_MoveConstructiblePair<_U1, _U2>() && _ImplicitlyMoveConvertiblePair<_U1, _U2>()), bool>::type <anonymous> > constexpr std::pair<_T1, _T2>::pair(_U1&&, _U2&&)'
  341 |  constexpr pair(_U1&& __x, _U2&& __y)
      |            ^~~~
/usr/include/c++/9/bits/stl_pair.h:341:12: note:   template argument deduction/substitution failed:
/usr/include/c++/9/bits/stl_pair.h:332:17: note: candidate: 'template<class _U2, typename std::enable_if<_CopyMovePair<false, int, _U2>(), bool>::type <anonymous> > std::pair<_T1, _T2>::pair(const _T1&, _U2&&)'
  332 |        explicit pair(const _T1& __x, _U2&& __y)
      |                 ^~~~
/usr/include/c++/9/bits/stl_pair.h:332:17: note:   template argument deduction/substitution failed:
/usr/include/c++/9/bits/stl_pair.h:325:18: note: candidate: 'template<class _U2, typename std::enable_if<_CopyMovePair<true, int, _U2>(), bool>::type <anonymous> > constexpr std::pair<_T1, _T2>::pair(const _T1&, _U2&&)'
  325 |        constexpr pair(const _T1& __x, _U2&& __y)
      |                  ^~~~
/usr/include/c++/9/bits/stl_pair.h:325:18: note:   template argument deduction/substitution failed:
/usr/include/c++/9/bits/stl_pair.h:318:27: note: candidate: 'template<class _U1, typename std::enable_if<_MoveCopyPair<false, _U1, int>(), bool>::type <anonymous> > constexpr std::pair<_T1, _T2>::pair(_U1&&, const _T2&)'
  318 |        explicit constexpr pair(_U1&& __x, const _T2& __y)
      |                           ^~~~
/usr/include/c++/9/bits/stl_pair.h:318:27: note:   template argument deduction/substitution failed:
/usr/include/c++/9/bits/stl_pair.h:311:18: note: candidate: 'template<class _U1, typename std::enable_if<_MoveCopyPair<true, _U1, int>(), bool>::type <anonymous> > constexpr std::pair<_T1, _T2>::pair(_U1&&, const _T2&)'
  311 |        constexpr pair(_U1&& __x, const _T2& __y)
      |                  ^~~~
/usr/include/c++/9/bits/stl_pair.h:311:18: note:   template argument deduction/substitution failed:
/usr/include/c++/9/bits/stl_pair.h:304:17: note: candidate: 'constexpr std::pair<_T1, _T2>::pair(std::pair<_T1, _T2>&&) [with _T1 = int; _T2 = int]'
  304 |       constexpr pair(pair&&) = default;
      |                 ^~~~
/usr/include/c++/9/bits/stl_pair.h:304:17: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/9/bits/stl_pair.h:303:17: note: candidate: 'constexpr std::pair<_T1, _T2>::pair(const std::pair<_T1, _T2>&) [with _T1 = int; _T2 = int]'
  303 |       constexpr pair(const pair&) = default;
      |                 ^~~~
/usr/include/c++/9/bits/stl_pair.h:303:17: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/9/bits/stl_pair.h:300:21: note: candidate: 'template<class _U1, class _U2, typename std::enable_if<(std::_PCC<((! std::is_same<int, _U1>::value) || (! std::is_same<int, _U2>::value)), int, int>::_ConstructiblePair<_U1, _U2>() && (! std::_PCC<((! std::is_same<int, _U1>::value) || (! std::is_same<int, _U2>::value)), int, int>::_ImplicitlyConvertiblePair<_U1, _U2>())), bool>::type <anonymous> > constexpr std::pair<_T1, _T2>::pair(const std::pair<_U1, _U2>&)'
  300 |  explicit constexpr pair(const pair<_U1, _U2>& __p)
      |                     ^~~~
/usr/include/c++/9/bits/stl_pair.h:300:21: note:   template argument deduction/substitution failed:
tea.cpp:99:47: note:   mismatched types 'const std::pair<_T1, _T2>' and 'int'
   99 |     pend.pb(pp{int(ans.size()), data[i].second});
      |                                               ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/bits/specfun.h:45,
                 from /usr/include/c++/9/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:41,
                 from tea.cpp:1:
/usr/include/c++/9/bits/stl_pair.h:291:19: note: candidate: 'template<class _U1, class _U2, typename std::enable_if<(std::_PCC<((! std::is_same<int, _U1>::value) || (! std::is_same<int, _U2>::value)), int, int>::_ConstructiblePair<_U1, _U2>() && std::_PCC<((! std::is_same<int, _U1>::value) || (! std::is_same<int, _U2>::value)), int, int>::_ImplicitlyConvertiblePair<_U1, _U2>()), bool>::type <anonymous> > constexpr std::pair<_T1, _T2>::pair(const std::pair<_U1, _U2>&)'
  291 |         constexpr pair(const pair<_U1, _U2>& __p)
      |                   ^~~~
/usr/include/c++/9/bits/stl_pair.h:291:19: note:   template argument deduction/substitution failed:
tea.cpp:99:47: note:   mismatched types 'const std::pair<_T1, _T2>' and 'int'
   99 |     pend.pb(pp{int(ans.size()), data[i].second});
      |                                               ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/bits/specfun.h:45,
                 from /usr/include/c++/9/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:41,
                 from tea.cpp:1:
/usr/include/c++/9/bits/stl_pair.h:269:26: note: candidate: 'template<class _U1, class _U2, typename std::enable_if<(_ConstructiblePair<_U1, _U2>() && (! _ImplicitlyConvertiblePair<_U1, _U2>())), bool>::type <anonymous> > constexpr std::pair<_T1, _T2>::pair(const _T1&, const _T2&)'
  269 |       explicit constexpr pair(const _T1& __a, const _T2& __b)
      |                          ^~~~
/usr/include/c++/9/bits/stl_pair.h:269:26: note:   template argument deduction/substitution failed:
/usr/include/c++/9/bits/stl_pair.h:260:17: note: candidate: 'template<class _U1, class _U2, typename std::enable_if<(_ConstructiblePair<_U1, _U2>() && _ImplicitlyConvertiblePair<_U1, _U2>()), bool>::type <anonymous> > constexpr std::pair<_T1, _T2>::pair(const _T1&, const _T2&)'
  260 |       constexpr pair(const _T1& __a, const _T2& __b)
      |                 ^~~~
/usr/include/c++/9/bits/stl_pair.h:260:17: note: