Language: C++

#include <bits/stdc++.h>
#include <math.h>

using namespace std;

int main(){
    int n,k;
    cin>>n>>k;
    vector<int> hoge(n);
    
    for(int i=0;i<n;i++) cin>>hoge.at(i);
    
    long long ans=10000000;
    
    for(int i=0;i<=n-k;i++){
        if(hoge.at(i)>=0 && hoge.at(i+k-1)>=0) ans=min(ans,hoge.at(i+k-1));
        if(hoge.at(i)<=0 && hoge.at(i+k-1)>=0) ans=min(ans,2*(abs(hoge.at(i))+hoge.at(i+k-1))-max(abs(hoge.at(i)),hoge.at(i+k-1)));
        if(hoge.at(i)<=0 && hoge.at(i+k-1)<=0) ans=min(ans,abs(hoge.at(i)));
    }
    
    cout<<ans<<endl;
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:55: error: no matching function for call to 'min(long long int&, __gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type&)'
   16 |         if(hoge.at(i)>=0 && hoge.at(i+k-1)>=0) ans=min(ans,hoge.at(i+k-1));
      |                                                    ~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:16:55: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'})
   16 |         if(hoge.at(i)>=0 && hoge.at(i+k-1)>=0) ans=min(ans,hoge.at(i+k-1));
      |                                                    ~~~^~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:16:55: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   16 |         if(hoge.at(i)>=0 && hoge.at(i+k-1)>=0) ans=min(ans,hoge.at(i+k-1));
      |                                                    ~~~^~~~~~~~~~~~~~~~~~~~
a.cc:17:55: error: no matching function for call to 'min(long long int&, int)'
   17 |         if(hoge.at(i)<=0 && hoge.at(i+k-1)>=0) ans=min(ans,2*(abs(hoge.at(i))+hoge.at(i+k-1))-max(abs(hoge.at(i)),hoge.at(i+k-1)));
      |                                                    ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:17:55: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   17 |         if(hoge.at(i)<=0 && hoge.at(i+k-1)>=0) ans=min(ans,2*(abs(hoge.at(i))+hoge.at(i+k-1))-max(abs(hoge.at(i)),hoge.at(i+k-1)));
      |                                                    ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:17:55: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   17 |         if(hoge.at(i)<=0 && hoge.at(i+k-1)>=0) ans=min(ans,2*(abs(hoge.at(i))+hoge.at(i+k-1))-max(abs(hoge.at(i)),hoge.at(i+k-1)));
      |                                                    ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:18:55: error: no matching function for call to 'min(long long int&, int)'
   18 |         if(hoge.at(i)<=0 && hoge.at(i+k-1)<=0) ans=min(ans,abs(hoge.at(i)));
      |                                                    ~~~^~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:18:55: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   18 |         if(hoge.at(i)<=0 && hoge.at(i+k-1)<=0) ans=min(ans,abs(hoge.at(i)));
      |                                                    ~~~^~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:18:55: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   18 |         if(hoge.at(i)<=0 && hoge.at(i+k-1)<=0) ans=min(ans,abs(hoge.at(i)));
      |                                                    ~~~^~~~~~~~~~~~~~~~~~~~~