Language: C++

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp> 
using namespace __gnu_pbds;
#define ordered_set tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update>
using namespace std;
#define ll long long
#define pb push_back
#define F first
#define S second
#define all(c)  c.begin(), c.end()
#define llv vector< ll >
#define mp make_pair
#define endl "\n"
const int N = (int)1e5+10 ;
const int M = (int)1000000007;

int main(){
    // #ifndef ONLINE_JUDGE
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    // #endif
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    
    ll n , i , k ;
    cin >> n ;
    ll h[n] ;
    for(i=0 ; i<n ; i++){
        cin >> h[i] ;
    }
    ll dp[n] ;
    dp[0]=0 ;
    dp[1]=abs(h[1]-h[0]) ;
    for(i=2 ; i<n ; i++){
        dp[i]=M ;
        for(ll j=i-1 ; j>=max(0 , i-k) ; j--){
            dp[i] = min(dp[j] + abs(h[i]-h[j])) ;
         }
    }
    cout << dp[n-1] ;
    
    
    return 0 ;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:37:30: error: no matching function for call to 'max(int, long long int)'
   37 |         for(ll j=i-1 ; j>=max(0 , i-k) ; j--){
      |                           ~~~^~~~~~~~~
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:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:37:30: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   37 |         for(ll j=i-1 ; j>=max(0 , i-k) ; j--){
      |                           ~~~^~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: 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:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:37:30: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   37 |         for(ll j=i-1 ; j>=max(0 , i-k) ; j--){
      |                           ~~~^~~~~~~~~
a.cc:38:24: error: no matching function for call to 'min(long long int)'
   38 |             dp[i] = min(dp[j] + abs(h[i]-h[j])) ;
      |                     ~~~^~~~~~~~~~~~~~~~~~~~~~~~
/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:   candidate expects 2 arguments, 1 provided
/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, 1 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:   template argument deduction/substitution failed:
a.cc:38:24: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   38 |             dp[i] = min(dp[j] + abs(h[i]-h[j])) ;
      |                     ~~~^~~~~~~~~~~~~~~~~~~~~~~~
/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:   candidate expects 2 arguments, 1 provided