Language: C++

#include <iostream>
#include <vector>
#include <cmath>
#include <climits>
#include <string>
#include <unordered_map>
#include <algorithm>
using namespace std;

int main(){
	long long n;
	cin >> n;
	vector <long long> arr1(n);
	vector <long long> arr2(n);
	long long sum1 = 0, sum2 = 0;
	for (long long z=0;z<n;z++) {cin >> arr1[z]; sum1 += arr1[z];}
	for (long long z=0;z<n;z++) {cin >> arr2[z]; sum2 += arr2[z];}
	if (sum1 < sum2) {cout << -1 << endl;}
	else {
		long long count = 0;
		vector <long long> temp;
		for (long long z=0;z<n;z++){
			if (arr1[z] > arr2[z]) temp.push_back(arr1[z]-arr2[z]);
		}
		long long x=0;
		for (long long z=0;z<n;z++){
			if (arr1[z] < arr2[z]) {
				count = max(count,1);
				count ++;
				long long different = arr2[z] - arr1[z];
				if (temp[x] >= different) temp[x] -= different;
				else {
					while (different > 0 && x<n && temp[x] < different){
						count ++;
						different -= temp[x];
						x++;
					}
					temp[x] -= different;
				}
			}
		}
		cout << count << endl;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:44: error: no matching function for call to 'max(long long int&, int)'
   28 |                                 count = max(count,1);
      |                                         ~~~^~~~~~~~~
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:28:44: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   28 |                                 count = max(count,1);
      |                                         ~~~^~~~~~~~~
/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:7:
/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:28:44: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   28 |                                 count = max(count,1);
      |                                         ~~~^~~~~~~~~