Language: C++

///////////////////////////////////////////
//                                       //
//      Gagan_Sharma : DTU               // 
//                                       //                   
///////////////////////////////////////////
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

#define int        long long
// #define mp      make_pair
#define eb         emplace_back
#define pb         push_back
#define ss         second
#define ff         first
#define IOS        ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define mod        998244353
#define MOD        (1000*1000*1000+7)
#define MN         LLONG_MIN
#define MX         LLONG_MAX
#define v1d        vector<int>
#define v2d        vector<vector<int>>
#define vip        vector<pair<int,int> >
#define v1s        vector<string>
#define pa         pair<int,int>
#define mxpq(T)    priority_queue <T>
#define mnpq(T)    priority_queue<T,vector<T>,greater<T>>
#define print(v)   for(auto i:v)cout<<i<<" ";cout<<"\n";
#define p2d(v)     for(auto a:v){for(auto b:a)cout<<b<<" ";cout<<endl;}
#define p1d(v)     for(auto a:v)cout<<a<<" ";cout<<endl;
#define ppd(v)     for(auto a:v)cout<<a.ff<<" "<<a.ss<<endl;
#define endl       '\n'
#define input(b,n) for(int i=0;i<n;i++)cin>>b[i+1];
#define Sort(v)    sort(v.begin(),v.end())
#define RSort(v)   sort(v.rbegin(),v.rend())
#define all(v)     v.begin(),v.end()
int gcd(int a,int b){return b?gcd(b,a%b):a;}
//string s = bitset<64>(a).to_string();

typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
#define fbo find_by_order // iterator to the kth element
#define ook order_of_key  //number of items that are strictly smaller than our item k
// #define T pair<int, int>
// #define ordered_set tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>

void read(int n=12){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cout<<setprecision(n)<<fixed;
    #ifndef ONLINE_JUDGE
         freopen("input.txt",  "r",  stdin);
         freopen("output.txt", "w", stdout);
    #endif
}

//____________________________________________________________________________________


void solve(){
    int n;cin>>n;
    v1d h(n+5);input(h,n);
    v1d dp(n+5);
    dp[1] = 0;
    dp[2] = abs(h[2]-h[1]);
    for(int i=3;i<=n;i++)dp[i] = min(dp[i-1]+abs(h[i]-h[i-1], dp[i-2]+abs(h[i]-h[i-2])));
    cout<<dp[n];

}
 
int32_t main(){
    read();
    int t = 1;
    // cin>>t;
    while(t--){
        solve();
    }
    


    return 0;
}                                                                                         


Compiler output:
a.cc: In function 'void solve()':
a.cc:67:49: error: no matching function for call to 'abs(__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type, __gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type)'
   67 |     for(int i=3;i<=n;i++)dp[i] = min(dp[i-1]+abs(h[i]-h[i-1], dp[i-2]+abs(h[i]-h[i-2])));
      |                                              ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166,
                 from a.cc:6:
/usr/include/c++/14/bits/valarray_after.h:445:5: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_UnClos<std::_Abs, std::_ValArray, _Tp>, _Tp> std::abs(const valarray<_Tp>&)'
  445 |     _DEFINE_EXPR_UNARY_FUNCTION(abs, struct std::_Abs)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:445:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/valarray_after.h:445:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_UnClos<std::_Abs, std::_Expr, _Dom>, typename _Dom::value_type> std::abs(const _Expr<_Dom1, typename _Dom1::value_type>&)'
  445 |     _DEFINE_EXPR_UNARY_FUNCTION(abs, struct std::_Abs)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:445:5: note:   candidate expects 1 argument, 2 provided
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:892:5: note: candidate: 'template<class _Tp> _Tp std::abs(const complex<_Tp>&)'
  892 |     abs(const complex<_Tp>& __z) { return __complex_abs(__z.__rep()); }
      |     ^~~
/usr/include/c++/14/complex:892:5: note:   candidate expects 1 argument, 2 provided
In file included from /usr/include/c++/14/cstdlib:79,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:42:
/usr/include/stdlib.h:980:12: note: candidate: 'int abs(int)'
  980 | extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
      |            ^~~
/usr/include/stdlib.h:980:12: note:   candidate expects 1 argument, 2 provided
In file included from /usr/include/c++/14/cstdlib:81:
/usr/include/c++/14/bits/std_abs.h:137:3: note: candidate: 'constexpr __float128 std::abs(__float128)'
  137 |   abs(__float128 __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:137:3: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/std_abs.h:85:3: note: candidate: 'constexpr __int128 std::abs(__int128)'
   85 |   abs(__GLIBCXX_TYPE_INT_N_0 __x) { return __x >= 0 ? __x : -__x; }
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:85:3: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/std_abs.h:79:3: note: candidate: 'constexpr long double std::abs(long double)'
   79 |   abs(long double __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:79:3: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/std_abs.h:75:3: note: candidate: 'constexpr float std::abs(float)'
   75 |   abs(float __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:75:3: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/std_abs.h:71:3: note: candidate: 'constexpr double std::abs(double)'
   71 |   abs(double __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:71:3: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/std_abs.h:61:3: note: candidate: 'long long int std::abs(long long int)'
   61 |   abs(long long __x) { return __builtin_llabs (__x); }
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:61:3: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/std_abs.h:56:3: note: candidate: 'long int std::abs(long int)'
   56 |   abs(long __i) { return __builtin_labs(__i); }
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:56:3: note:   candidate expects 1 argument, 2 provided