Language: C++

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"
#define MOD 1000000007
#define ar array
#define fast_io ios_base::sync_with_stdio(false); cin.tie(NULL);

int n;
vector<int> h;
vector<int> cost;

int cost_to_n(int step) {
	if (step > n - 1) return 0;
	if (cost[step] != INT_MAX) return cost[step];
	int res = fabs(h[step + 1] - h[step]) + cost_to_n(step + 1);
	if (step + 2 < n) res = min(res, fabs(h[step + 2] - h[step]) + cost_to_n(step + 2));
	cost[step] = res;
	return res; 
}

int32_t main() {
	fast_io;

	// int t; cin >> t;
	// while (t--) {
		
	// }
	cin >> n;
	h.resize(n);
	cost.assign(n, INT_MAX);
	for (int i = 0; i < n; i++) {
		cin >> h[i];
	}
	cost[n - 1] = 0;
	cout << cost_to_n(0) << endl;

	return 0;
}

Compiler output:
a.cc: In function 'long long int cost_to_n(long long int)':
a.cc:17:36: error: no matching function for call to 'min(long long int&, __gnu_cxx::__enable_if<true, double>::__type)'
   17 |         if (step + 2 < n) res = min(res, fabs(h[step + 2] - h[step]) + cost_to_n(step + 2));
      |                                 ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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: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:   template argument deduction/substitution failed:
a.cc:17:36: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and '__gnu_cxx::__enable_if<true, double>::__type' {aka 'double'})
   17 |         if (step + 2 < n) res = min(res, fabs(h[step + 2] - h[step]) + cost_to_n(step + 2));
      |                                 ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/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:   candidate expects 1 argument, 2 provided
/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:   template argument deduction/substitution failed:
a.cc:17:36: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   17 |         if (step + 2 < n) res = min(res, fabs(h[step + 2] - h[step]) + cost_to_n(step + 2));
      |                                 ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~