Language: C++

//author:satwik_bhv1
#include<bits/stdc++.h>
//datatypes
#define ll long long 
#define ld long double
//loops
#define fr(i,z,n) for(ll i=z;i<n;i++)
#define br(i,z,n) for(ll i=z;i>n;i--)
//operations
#define mp  make_pair
#define ff  first
#define ss  second
#define pub push_back
#define all(v) v.begin(),v.end()
//map
#define mi map<ll,ll>
//vectors
#define vi vector<ll>
#define vpi vector<pair<ll,ll> >
//constants
#define pi 3.1415926535897932384626
#define mod 1000000007 
#define MAXN 100001
/*notes
    Don't use inbuilt fun for power
    Range of longlong=(-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 )
    INT_MAX = 2147483647(aprox 2*10^10)
    INT_MIN = -2147483648
    LLONG_MAX = 9223372036854775807 
    LLONG_MIN = -9223372036854775808
    __gcd is the function in built for hcf
    priority queue is max heap by default
    topological sort -> khan's algo use bfs and indegree of node  
    sssp(positive weighted edges) -> Dijkstras
    apsp -> Floydwarshall
    MST -> kruskal(DSU)
*/
using namespace std;
//functions
ll power(ll x,ll y){ll res=1;while(y){if(y%2){res*=x;}y/=2;x*=x;} return res;}
ll power(ll x,ll y,ll z){ll res=1;while(y){if(y%2){res=(res*x)%z;}y/=2;x=(x*x)%z;} return res;}
void fast() { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); }
bool sortbysec(const pair<ll, ll>& a, const pair<ll, ll>& b) { return (a.second > b.second); }
ll ceil(ll x,ll y){return (x/y)+(x%y!=0);}
vi dp;
ll n;
//vi v;
ll fun(ll ind,vector<ll> *v)
{
    if(ind==n-1)
    {
        return dp[ind]=0;
    }
    if(ind>n-1)
    {
        return -1;
    }
    if(dp[ind]!=-1)
    {
        return dp[ind];
    }
    ll l=LLONG_MAX,r=LLONG_MAX;
    if(fun(ind+1,v)!=-1)
    {
        l=abs(v[ind]-v[ind+1])+dp[ind+1];
    }
    if(fun(ind+2,v)!=-1)
    {
        r=abs(v[ind]-v[ind+2])+dp[ind+2];
    }
    return dp[ind]=min(l,r);
}
void solve()
{
    cin>>n;
    vector<ll> v;
    fr(i,0,n)
    {
        ll o;
        cin>>o;
        v.pub(o);
        dp.pub(-1);
    }
    cout<<fun(0,&v);
}
int main()
{
    fast();
    ll t;
    t=1;
    //cin>>t;
    fr(i,0,t)
    {
        solve();
    }
}
/*





























*/


Compiler output:
a.cc: In function 'long long int fun(long long int, std::vector<long long int>*)':
a.cc:65:21: error: no match for 'operator-' (operand types are 'std::vector<long long int>' and 'std::vector<long long int>')
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |               ~~~~~~^~~~~~~~~
      |                    |        |
      |                    |        vector<[...]>
      |                    vector<[...]>
In file included from /usr/include/c++/14/bits/stl_algobase.h:67,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_iterator.h:618:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__y.base() - __x.base())) std::operator-(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  618 |     operator-(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:618:5: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
/usr/include/c++/14/bits/stl_iterator.h:1790:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__x.base() - __y.base())) std::operator-(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1790 |     operator-(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1790:5: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::move_iterator<_IteratorL>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
In file included from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/complex:370:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&, const complex<_Tp>&)'
  370 |     operator-(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:370:5: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::complex<_Tp>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
/usr/include/c++/14/complex:379:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&, const _Tp&)'
  379 |     operator-(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:379:5: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::complex<_Tp>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
/usr/include/c++/14/complex:388:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const _Tp&, const complex<_Tp>&)'
  388 |     operator-(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:388:5: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::complex<_Tp>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
/usr/include/c++/14/complex:465:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&)'
  465 |     operator-(const complex<_Tp>& __x)
      |     ^~~~~~~~
/usr/include/c++/14/complex:465:5: note:   candidate expects 1 argument, 2 provided
In file included from /usr/include/c++/14/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166:
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
/usr/include/c++/14/valarray:1197:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const valarray<_Tp>&, const valarray<_Tp>&)'
 1197 | _DEFINE_BINARY_OPERATOR(-, __minus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1197:1: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::valarray<_Tp>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
/usr/include/c++/14/valarray:1197:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)'
 1197 | _DEFINE_BINARY_OPERATOR(-, __minus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1197:1: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::valarray<_Tp>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
/usr/include/c++/14/valarray:1197:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)'
 1197 | _DEFINE_BINARY_OPERATOR(-, __minus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1197:1: note:   template argument deduction/substitution failed:
a.cc:65:29: note:   'std::vector<long long int>' is not derived from 'const std::valarray<_Tp>'
   65 |         l=abs(v[ind]-v[ind+1])+dp[ind+1];
      |                             ^
a.cc:69:21: error: no match for 'operator-' (operand types are 'std::vector<long long int>' and 'std::vector<long long int>')
   69 |         r=abs(v[ind]-v[ind+2])+dp[ind+2];
      |               ~~~~~~^~~~~~~~~
      |                    |        |
      |                    |        vector<[...]>
      |