Language: C++

#include<iostream>
#include<algorithm>
using namespace std;
int main()
{
  int N; cin >> N;
  int a[N];
  for(int i = 0;i < N;++i) {
    cin >> a[i];
  }
  int b = *max_element(a);
  int c = *min_element(a);
  int d = b - c;
  cout << d << endl; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:23: error: no matching function for call to 'max_element(int [N])'
   11 |   int b = *max_element(a);
      |            ~~~~~~~~~~~^~~
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_algo.h:5641:5: note: candidate: 'template<class _FIter> constexpr _FIter std::max_element(_FIter, _FIter)'
 5641 |     max_element(_ForwardIterator __first, _ForwardIterator __last)
      |     ^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:5641:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algo.h:5666:5: note: candidate: 'template<class _FIter, class _Compare> constexpr _FIter std::max_element(_FIter, _FIter, _Compare)'
 5666 |     max_element(_ForwardIterator __first, _ForwardIterator __last,
      |     ^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:5666:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:86:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:524:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator, class _Compare> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator> std::max_element(_ExecutionPolicy&&, _ForwardIterator, _ForwardIterator, _Compare)'
  524 | max_element(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Compare __comp);
      | ^~~~~~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:524:1: note:   candidate expects 4 arguments, 1 provided
/usr/include/c++/14/pstl/glue_algorithm_defs.h:528:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator> std::max_element(_ExecutionPolicy&&, _ForwardIterator, _ForwardIterator)'
  528 | max_element(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last);
      | ^~~~~~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:528:1: note:   candidate expects 3 arguments, 1 provided
a.cc:12:23: error: no matching function for call to 'min_element(int [N])'
   12 |   int c = *min_element(a);
      |            ~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_algo.h:5577:12: note: candidate: 'template<class _FIter> constexpr _FIter std::min_element(_FIter, _FIter)'
 5577 |     inline min_element(_ForwardIterator __first, _ForwardIterator __last)
      |            ^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:5577:12: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algo.h:5602:5: note: candidate: 'template<class _FIter, class _Compare> constexpr _FIter std::min_element(_FIter, _FIter, _Compare)'
 5602 |     min_element(_ForwardIterator __first, _ForwardIterator __last,
      |     ^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:5602:5: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/14/pstl/glue_algorithm_defs.h:516:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator, class _Compare> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator> std::min_element(_ExecutionPolicy&&, _ForwardIterator, _ForwardIterator, _Compare)'
  516 | min_element(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Compare __comp);
      | ^~~~~~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:516:1: note:   candidate expects 4 arguments, 1 provided
/usr/include/c++/14/pstl/glue_algorithm_defs.h:520:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator> std::min_element(_ExecutionPolicy&&, _ForwardIterator, _ForwardIterator)'
  520 | min_element(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last);
      | ^~~~~~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:520:1: note:   candidate expects 3 arguments, 1 provided