Language: C++

#include<bits/stdc++.h>
#include <iostream>

int main()
{
    int n;
    cin >> n;
    vector<int> mV;
    for (int i = 0; i < n; i++) {
        int x;
        cin >> x;
        mV.push_back(x);
    }

    vector<int> fA(n);
    fA[n - 1] = 0;
    fA[n - 2] = abs(mV[n - 1] - mV[n - 2]);

    for (int i = n - 3; i >= 0; i--) {
        fA[i] = min(abs(mV[i] - mV[i + 1]) + fA[i + 1], abs(mV[i] - mV[i + 2]) + fA[i + 2]);

    }

    cout << fA[0] << endl;
    
}



Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |     cin >> n;
      |     ^~~
      |     std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:8:5: error: 'vector' was not declared in this scope
    8 |     vector<int> mV;
      |     ^~~~~~
a.cc:8:5: 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:
/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:8:12: error: expected primary-expression before 'int'
    8 |     vector<int> mV;
      |            ^~~
a.cc:12:9: error: 'mV' was not declared in this scope
   12 |         mV.push_back(x);
      |         ^~
a.cc:15:12: error: expected primary-expression before 'int'
   15 |     vector<int> fA(n);
      |            ^~~
a.cc:16:5: error: 'fA' was not declared in this scope
   16 |     fA[n - 1] = 0;
      |     ^~
a.cc:17:21: error: 'mV' was not declared in this scope
   17 |     fA[n - 2] = abs(mV[n - 1] - mV[n - 2]);
      |                     ^~
a.cc:20:17: error: 'min' was not declared in this scope; did you mean 'std::min'?
   20 |         fA[i] = min(abs(mV[i] - mV[i + 1]) + fA[i + 1], abs(mV[i] - mV[i + 2]) + fA[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:24:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   24 |     cout << fA[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:24:22: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   24 |     cout << fA[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)
      |     ^~~~