Language: C++

#include <iostream>
#include <math.h>
#include <fstream>
#include <algorithm>
#include <string>
#include <string.h>
#include <queue>
#include <vector>
#include <set>
#include <map>
using namespace std;
std::vector<long long int> enum_div(long long  n)//nの約数を列挙
{
	std::vector<long long int> ret;
	for (int i = 1; i*i <= n; ++i)
	{
		if (n%i == 0)
		{
			ret.push_back(i);
			if (i != 1 && i*i != n)
			{
				ret.push_back(n / i);
			}
		}
	}
	return ret;
}
int main() {
	long long int N, K, sum = 0;
	int ans = 0;
	cin >> N >> K;
	vector<int>A(N);
	for (int i = 0; i < N; i++)
	{
		cin >> A[i];
		sum += A[i];
	}
	std::vector<long long int> r = enum_div(sum);
	for (int i = 0; i < r.size(); i++)
	{
		int c = 0;
		for (int j = 0; j < N; j++)
		{
			c += min(A[j] % r[i], r[i] - (A[j] % r[i]));
		}
		if (K * 2 >= c)ans = max(r[i], ans);
	}
	cout << ans;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:46:41: error: no matching function for call to 'max(__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&, int&)'
   46 |                 if (K * 2 >= c)ans = max(r[i], ans);
      |                                      ~~~^~~~~~~~~~~
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:46:41: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   46 |                 if (K * 2 >= c)ans = max(r[i], ans);
      |                                      ~~~^~~~~~~~~~~
/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:4:
/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:46:41: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   46 |                 if (K * 2 >= c)ans = max(r[i], ans);
      |                                      ~~~^~~~~~~~~~~