Language: C++

#include<bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define fir first
#define sec second
#define SZ(a) (int)((a).size())
using namespace std;
typedef long long ll;
typedef double db;
typedef pair <int, int> Pii;
typedef pair <ll, int> Pli;
typedef unsigned long long ull;
const double eps = 1e-8;
const ll infll = 0x7fffffffffffffff;
const int mod = (int)(1e9) + 7;
const int inf = 0x7fffffff;
const int maxn = (int)(2e5) + 7;
const int maxm = 300;

int n, m;
ll k, a[maxn], b[maxn], pre[maxn];

int main() {

	// freopen("in.in", "r", stdin);
	scanf("%d%d%lld", &n, &m, &k);
	for (int i = 1; i <= n; i++) {
		scanf("%lld", &a[i]);
		pre[i] = pre[i - 1] + a[i];
	}
	ll now = 0, res = 0;
	for (int i = 1; i <= m; i++) {
		scanf("%lld", &b[i]);
		now += b[i];
		ll d = k - now;
		if (d >= 0) res = max(res, i + upper_bound(pre + 1, pre + 1 + n, d) - pre - 1);
	}
	printf("%lld\n", res);

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:38: error: no matching function for call to 'max(ll&, long int)'
   36 |                 if (d >= 0) res = max(res, i + upper_bound(pre + 1, pre + 1 + n, d) - pre - 1);
      |                                   ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:36:38: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'long int')
   36 |                 if (d >= 0) res = max(res, i + upper_bound(pre + 1, pre + 1 + n, d) - pre - 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:
/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:36:38: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   36 |                 if (d >= 0) res = max(res, i + upper_bound(pre + 1, pre + 1 + n, d) - pre - 1);
      |                                   ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~