Language: C++

#pragma GCC optimize("O3")
#include<bits/stdc++.h>

using namespace std;
typedef long long ll;

#define REP(i,n) for(ll i=0;i<ll(n);i++)
#define REPD(i,n) for(ll i=n-1;i>=0;i--)
#define FOR(i,a,b) for(ll i=a;i<ll(b);i++)
#define FORD(i,a,b) for(ll i=a;i>ll(b);i--)
#define ALL(x) x.begin(),x.end() 
#define SIZE(x) ll(x.size()) 
#define INF 1000000000000 
#define MOD 1000000007 
#define MAXR 100000 
#define PB push_back 
#define MP make_pair 
#define F first 
#define S second 
#define Umap unordered_map
#define Uset unordered_set


signed main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    ll N, M, K;
    cin >> N >> M >> K;
    vector<ll> A(N);
    vector<ll> B(M);
    REP(i, N) cin >> A[i];
    REP(i, M) cin >> B[i];

    vector<ll> accum_A(N+1);
    accum_A.at(0) = 0;
    vector<ll> accum_B(M+1);
    accum_B.at(0) = 0;
    FOR(i, 1, N+1) accum_A.at(i) = accum_A.at(i-1) + A.at(i-1);
    FOR(i, 1, M+1) accum_B.at(i) = accum_B.at(i-1) + B.at(i-1);

    // Aの最大回数
    ll max_a;
    FOR(i, 1, N+1) {
        if (accum_A > K) max_a = i;
    } 

    ll max_sassu = 0;
    FOR(i_n, 0, max_a) {
        ll time_sum = accum_A.at(i_n);
        if (time_sum > K) {
            break;
        }
        ll sassu = i_n;

        FOR(i_m, 1, M+1) {
            ll ts = time_sum + accum_B.at(i_m);
            if (ts > K) {
                sassu += i_m-1;
                if (max_sassu < sassu) max_sassu = sassu;
                break;
            } 
            else if (i_m==M) {
                sassu += M;
                if (max_sassu < sassu) max_sassu = sassu;
                break;
            }
        }
    }

    cout << max_sassu << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:45:21: error: no match for 'operator>' (operand types are 'std::vector<long long int>' and 'll' {aka 'long long int'})
   45 |         if (accum_A > K) max_a = i;
      |             ~~~~~~~ ^ ~
      |             |         |
      |             |         ll {aka long long int}
      |             std::vector<long long int>
In file included from /usr/include/c++/14/regex:68,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:181,
                 from a.cc:2:
/usr/include/c++/14/bits/regex.h:1176:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator>(const sub_match<_BiIter>&, const sub_match<_BiIter>&)'
 1176 |     operator>(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1176:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/bits/regex.h:1236:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator>(__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const sub_match<_BiIter>&)'
 1236 |     operator>(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1236:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/bits/regex.h:1329:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator>(const sub_match<_BiIter>&, __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)'
 1329 |     operator>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1329:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/bits/regex.h:1403:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const typename std::iterator_traits<_Iter>::value_type*, const sub_match<_BiIter>&)'
 1403 |     operator>(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1403:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'll' {aka 'long long int'}
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/bits/regex.h:1497:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1497 |     operator>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1497:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/bits/regex.h:1573:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const typename std::iterator_traits<_Iter>::value_type&, const sub_match<_BiIter>&)'
 1573 |     operator>(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1573:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'll' {aka 'long long int'}
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/bits/regex.h:1673:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1673 |     operator>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1673:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51:
/usr/include/c++/14/bits/stl_pair.h:1058:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator>(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1058 |     operator>(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1058:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'const std::pair<_T1, _T2>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/usr/include/c++/14/bits/stl_iterator.h:462:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  462 |     operator>(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:462:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/bits/stl_iterator.h:507:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  507 |     operator>(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:507:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/bits/stl_iterator.h:1714:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1714 |     operator>(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1714:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'const std::move_iterator<_IteratorL>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/bits/stl_iterator.h:1774:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1774 |     operator>(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1774:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'const std::move_iterator<_IteratorL>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/string_view:695:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  695 |     operator> (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:695:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/string_view:702:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  702 |     operator> (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:702:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/string_view:710:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  710 |     operator> (__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:710:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'long long int'
   45 |         if (accum_A > K) max_a = i;
      |                       ^
/usr/include/c++/14/bits/basic_string.h:3915:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3915 |     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3915:5: note:   template argument deduction/substitution failed:
a.cc:45:23: note:   'std::vector<long long int>' is not derived from 'const std