Language: C++

#include<bits/stdc++.h>
int main() {
  int n=0,tmp=0;
  vector<int> stones;
  vector<int> out;
  cin>>n;
  for(int i=0;i<n;i++) {
    cin>>tmp;
    stones.push_back(tmp);
  }
  if(n<=1) {
    cout<<0<<endl;
    return 0;
  }
  out[0]=0;
  out[1]=abs(stones[1]-stones[0]);
  for(int i=2;i<n;i++) {
    out[i]=min(out[i-1]+abs(stones[i]-stones[i-1]),out[i-2]+abs(stones[i]-stones[i-2]));
  }
  cout<<out[n-1]<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:3: error: 'vector' was not declared in this scope
    4 |   vector<int> stones;
      |   ^~~~~~
a.cc:4:3: note: suggested alternatives:
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_vector.h:428:11: note:   'std::vector'
  428 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
/usr/include/c++/14/vector:93:13: note:   'std::pmr::vector'
   93 |       using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
      |             ^~~~~~
a.cc:4:10: error: expected primary-expression before 'int'
    4 |   vector<int> stones;
      |          ^~~
a.cc:5:10: error: expected primary-expression before 'int'
    5 |   vector<int> out;
      |          ^~~
a.cc:6:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |   cin>>n;
      |   ^~~
      |   std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:9:5: error: 'stones' was not declared in this scope
    9 |     stones.push_back(tmp);
      |     ^~~~~~
a.cc:12:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   12 |     cout<<0<<endl;
      |     ^~~~
      |     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:12:14: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   12 |     cout<<0<<endl;
      |              ^~~~
      |              std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:15:3: error: 'out' was not declared in this scope
   15 |   out[0]=0;
      |   ^~~
a.cc:16:14: error: 'stones' was not declared in this scope
   16 |   out[1]=abs(stones[1]-stones[0]);
      |              ^~~~~~
a.cc:18:12: error: 'min' was not declared in this scope; did you mean 'std::min'?
   18 |     out[i]=min(out[i-1]+abs(stones[i]-stones[i-1]),out[i-2]+abs(stones[i]-stones[i-2]));
      |            ^~~
      |            std::min
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51:
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: 'std::min' declared here
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
a.cc:20:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   20 |   cout<<out[n-1]<<endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:20:19: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   20 |   cout<<out[n-1]<<endl;
      |                   ^~~~
      |                   std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~