Language: C++

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

int main(){
  int n;
  cin >> n;
  int a[n+10];
  for (int i =0;i<n;i++) cin >> a[i];
  long long int ans=0,nummi=0,mina;
  if (a[0]<0){
    mina = -a[0];
  }else{
    mina = a[0];
  }
  for (int i =0;i<n;i++){
    if (a[i] < 0){
      mina = min(mina,-a[i]);
      ans = ans - a[i];
      nummi += 1;
    }else{
      mina = min(a[i],mina);
      ans += a[i];
    }
  }
  
  if ((nummi % 2) == 0){
    cout << ans;
  }else{
    cout << ans-2*mina;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:17: error: no matching function for call to 'min(long long int&, int)'
   19 |       mina = min(mina,-a[i]);
      |              ~~~^~~~~~~~~~~~
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:19:17: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   19 |       mina = min(mina,-a[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
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:3:
/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:19:17: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   19 |       mina = min(mina,-a[i]);
      |              ~~~^~~~~~~~~~~~
a.cc:23:17: error: no matching function for call to 'min(int&, long long int&)'
   23 |       mina = min(a[i],mina);
      |              ~~~^~~~~~~~~~~
/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:23:17: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   23 |       mina = min(a[i],mina);
      |              ~~~^~~~~~~~~~~
/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:23:17: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   23 |       mina = min(a[i],mina);
      |              ~~~^~~~~~~~~~~