Language: C++

#include "bits/stdc++.h"
using namespace std;

int main() {
	long long N, M, K;
	cin >> N >> M >> K;
	vector<long long> A(N), B(M);
	for (int i = 0; i < N; i++) cin >> A[i];
	for (int i = 0; i < M; i++) cin >> B[i];
	vector<long long> SA(N + 1), SB(M + 1);
	SA[0] = 0, SB[0] = 0;
	for (int i = 0; i < N; i++) SA[i + 1] = SA[i] + A[i];
	for (int i = 0; i < M; i++) SB[i + 1] = SB[i] + B[i];
	int ANS = 0;
	for (int i = 0; i <= N; i++) {
		if (SA[i] > K) break;
		ANS = max(ANS, i + (int)M - (SB.end() - upper_bound(SB.begin(), SB.end(), K - SA[i])));
	}
	cout << ANS << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:26: error: no matching function for call to 'max(int&, __gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >::difference_type)'
   17 |                 ANS = max(ANS, i + (int)M - (SB.end() - upper_bound(SB.begin(), SB.end(), K - SA[i])));
      |                       ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:17:26: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >::difference_type' {aka 'long int'})
   17 |                 ANS = max(ANS, i + (int)M - (SB.end() - upper_bound(SB.begin(), SB.end(), K - SA[i])));
      |                       ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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:17:26: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   17 |                 ANS = max(ANS, i + (int)M - (SB.end() - upper_bound(SB.begin(), SB.end(), K - SA[i])));
      |                       ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~