implementer.cpp: In function ‘char nextch()’:
implementer.cpp:15:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   15 |     if (pos == BUF_SIZE) fread(buf, BUF_SIZE, 1, fin), pos = 0;
      |                          ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
answer.code: In function ‘long long int solve(long long int, long long int, long long int*)’:
answer.code:38:26: error: no matching function for call to ‘max(long long int, int)’
   38 |         Q.upd_front(f[max(i-k,0)]+a[q[hd]]);
      |                       ~~~^~~~~~~
In file included from /usr/include/c++/13/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:51,
                 from answer.code:1:
/usr/include/c++/13/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++/13/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
answer.code:38:26: note:   deduced conflicting types for parameter ‘const _Tp’ (‘long long int’ and ‘int’)
   38 |         Q.upd_front(f[max(i-k,0)]+a[q[hd]]);
      |                       ~~~^~~~~~~
/usr/include/c++/13/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++/13/bits/stl_algobase.h:303:5: note:   template argument deduction/substitution failed:
answer.code:38:26: note:   deduced conflicting types for parameter ‘const _Tp’ (‘long long int’ and ‘int’)
   38 |         Q.upd_front(f[max(i-k,0)]+a[q[hd]]);
      |                       ~~~^~~~~~~
In file included from /usr/include/c++/13/algorithm:61:
/usr/include/c++/13/bits/stl_algo.h:5795:5: note: candidate: ‘template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)’
 5795 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/13/bits/stl_algo.h:5795:5: note:   template argument deduction/substitution failed:
answer.code:38:26: note:   mismatched types ‘std::initializer_list<_Tp>’ and ‘long long int’
   38 |         Q.upd_front(f[max(i-k,0)]+a[q[hd]]);
      |                       ~~~^~~~~~~
/usr/include/c++/13/bits/stl_algo.h:5805:5: note: candidate: ‘template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)’
 5805 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/13/bits/stl_algo.h:5805:5: note:   template argument deduction/substitution failed:
answer.code:38:26: note:   mismatched types ‘std::initializer_list<_Tp>’ and ‘long long int’
   38 |         Q.upd_front(f[max(i-k,0)]+a[q[hd]]);
      |                       ~~~^~~~~~~