Language: C++

#include <iostream>
#include <cmath>
#include <algorithm>


using namespace std;
int a[300001];
long long n;

long long ans(long long average) {
	//cout << "average:" << average << endl;

	long long total = 0;
	for (long long i = 0; i < n; i++) {
		total += abs(a[i] - average);
	}
	//cout << "total:" << total << endl;

	return total;
}

unsigned rando() {
    static unsigned y = 2463534242;
    y ^= y << 13;y ^= y >> 17;y ^= y << 5;
    return y;
}


int main() {
	cin >> n;

	long long total = 0;

	for (long long i = 0; i < n; i++) {
		cin >> a[i];
		a[i] -= i;
		total += (long long) a[i];
	}

	long long  average = total / n;
	long long anser = min(ans(average), ans(average -1));
	anser = min(anser,ans(average +1) );

	for (int i = max(0, n -1000); i < n; i+=4) {
		//int r = rando() % n;
		anser = min(anser,ans(a[i]));
		//cout << r << endl;
	}


	cout << anser << endl;


	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:44:25: error: no matching function for call to 'max(int, long long int)'
   44 |         for (int i = max(0, n -1000); i < n; i+=4) {
      |                      ~~~^~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 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:44:25: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   44 |         for (int i = max(0, n -1000); i < n; i+=4) {
      |                      ~~~^~~~~~~~~~~~
/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,
                 from a.cc:3:
/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:44:25: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   44 |         for (int i = max(0, n -1000); i < n; i+=4) {
      |                      ~~~^~~~~~~~~~~~