Language: C++

#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>

size_t calc(ssize_t l, ssize_t r) {
  size_t abs_l = std::abs(l);
  if (l < 0 && r > 0) {
    size_t min = std::min(abs_l, r);
    size_t max = std::max(abs_l, r);
    return 2 * min + max;
  } else if (l < 0) {
    return abs_l;
  } else {
    return r;
  }
}


int main() {
  size_t N, K;
  std::cin >> N >> K;

  std::vector<ssize_t> X(N);

  for (size_t i=0; i<N; i++) {
    std::cin >> X[i];
  }

  size_t ans = calc(X[i], X[N-1]);

  for (size_t i=0; i<N-K; i++) {
    size_t tmp = calc(X[i], X[i+K-1]);
    ans = std::min(ans, tmp);
  }

  std::cout << ans << std::endl;
  return 0;
}


Compiler output:
a.cc: In function 'size_t calc(ssize_t, ssize_t)':
a.cc:9:26: error: no matching function for call to 'min(size_t&, ssize_t&)'
    9 |     size_t min = std::min(abs_l, r);
      |                  ~~~~~~~~^~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 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:9:26: note:   deduced conflicting types for parameter 'const _Tp' ('long unsigned int' and 'ssize_t' {aka 'long int'})
    9 |     size_t min = std::min(abs_l, r);
      |                  ~~~~~~~~^~~~~~~~~~
/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,
                 from a.cc:4:
/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:9:26: note:   mismatched types 'std::initializer_list<_Tp>' and 'long unsigned int'
    9 |     size_t min = std::min(abs_l, r);
      |                  ~~~~~~~~^~~~~~~~~~
a.cc:10:26: error: no matching function for call to 'max(size_t&, ssize_t&)'
   10 |     size_t max = std::max(abs_l, r);
      |                  ~~~~~~~~^~~~~~~~~~
/usr/include/c++/14/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++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:10:26: note:   deduced conflicting types for parameter 'const _Tp' ('long unsigned int' and 'ssize_t' {aka 'long int'})
   10 |     size_t max = std::max(abs_l, r);
      |                  ~~~~~~~~^~~~~~~~~~
/usr/include/c++/14/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++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:10:26: note:   mismatched types 'std::initializer_list<_Tp>' and 'long unsigned int'
   10 |     size_t max = std::max(abs_l, r);
      |                  ~~~~~~~~^~~~~~~~~~
a.cc: In function 'int main()':
a.cc:30:23: error: 'i' was not declared in this scope
   30 |   size_t ans = calc(X[i], X[N-1]);
      |                       ^