answer.code: In function ‘void solve()’:
answer.code:82:21: error: no matching function for call to ‘max(int, long double)’
   82 |         int up = max(2 * k, 2 * sqrtl(n) + 2);
      |                  ~~~^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/bits/stl_tree.h:63,
                 from /usr/include/c++/11/map:60,
                 from answer.code:1:
/usr/include/c++/11/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++/11/bits/stl_algobase.h:254:5: note:   template argument deduction/substitution failed:
answer.code:82:21: note:   deduced conflicting types for parameter ‘const _Tp’ (‘int’ and ‘long double’)
   82 |         int up = max(2 * k, 2 * sqrtl(n) + 2);
      |                  ~~~^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/bits/stl_tree.h:63,
                 from /usr/include/c++/11/map:60,
                 from answer.code:1:
/usr/include/c++/11/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++/11/bits/stl_algobase.h:300:5: note:   template argument deduction/substitution failed:
answer.code:82:21: note:   deduced conflicting types for parameter ‘const _Tp’ (‘int’ and ‘long double’)
   82 |         int up = max(2 * k, 2 * sqrtl(n) + 2);
      |                  ~~~^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/deque:62,
                 from /usr/include/c++/11/queue:60,
                 from answer.code:5:
/usr/include/c++/11/bits/stl_algo.h:3461:5: note: candidate: ‘template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)’
 3461 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/11/bits/stl_algo.h:3461:5: note:   template argument deduction/substitution failed:
answer.code:82:21: note:   mismatched types ‘std::initializer_list<_Tp>’ and ‘int’
   82 |         int up = max(2 * k, 2 * sqrtl(n) + 2);
      |                  ~~~^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/deque:62,
                 from /usr/include/c++/11/queue:60,
                 from answer.code:5:
/usr/include/c++/11/bits/stl_algo.h:3467:5: note: candidate: ‘template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)’
 3467 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/11/bits/stl_algo.h:3467:5: note:   template argument deduction/substitution failed:
answer.code:82:21: note:   mismatched types ‘std::initializer_list<_Tp>’ and ‘int’
   82 |         int up = max(2 * k, 2 * sqrtl(n) + 2);
      |                  ~~~^~~~~~~~~~~~~~~~~~~~~~~~~