Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  ios::sync_with_stdio(0);
  int n;
  cin >> n;
  int h[n+1];
  h[0] = 0;
  
  int ans[n+1] = {INT_MAX};
  
  for(int i = 1; i <= n; ++i)
  {
    cin >> h[i];
  	if(i-1 > 0)
      ans = min(ans, abs(h[i-1]-h[i]));
    if(i-2 > 0)
      ans = min(ans, abs(h[i-2]-h[i]));
  }
  cout << ans[n];
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:16: error: no matching function for call to 'min(int [(n + 1)], int)'
   17 |       ans = min(ans, abs(h[i-1]-h[i]));
      |             ~~~^~~~~~~~~~~~~~~~~~~~~~~
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:17:16: note:   variable-sized array type 'int [(n + 1)]' is not a valid template argument
   17 |       ans = min(ans, abs(h[i-1]-h[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:
/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:17:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'int*'
   17 |       ans = min(ans, abs(h[i-1]-h[i]));
      |             ~~~^~~~~~~~~~~~~~~~~~~~~~~
a.cc:19:16: error: no matching function for call to 'min(int [(n + 1)], int)'
   19 |       ans = min(ans, abs(h[i-2]-h[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:19:16: note:   variable-sized array type 'int [(n + 1)]' is not a valid template argument
   19 |       ans = min(ans, abs(h[i-2]-h[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:19:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'int*'
   19 |       ans = min(ans, abs(h[i-2]-h[i]));
      |             ~~~^~~~~~~~~~~~~~~~~~~~~~~