Language: C++

#include<bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
#define rrep(i,n) for(int i=1;i<=(n);++i)
using namespace std;
using ll = long long;
using P = pair<int,int>;
const double Pi = acos(-1);
const ll mod=1e9+7;

int main(){
    ll n,m,k;
    cin >>n>>m>>k;
    ll a[n],b[m];
    ll bb[m];
    rep(i,n) {
        cin >>a[i];
    }
    rep(i,m) {
        cin >>b[i];
        if(i==0){
            bb[i]=b[i];
        }else{
            bb[i]=bb[i-1]+b[i];
        }
    }
    ll ans=0;
    ll at=0;
    ll jj=m-1;
    rep(i,n){
        at+=a[i];
        if(at>k) break;
        ans=max(ans,i+1);
        ll l=k-at;
        for(int j=jj;j>=0;j--){
            if(bb[j]<=l){
                ans=max(ans,i+j+2);
                jj=j;
                break;
            }
        }

    }
    cout << ans <<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:32:16: error: no matching function for call to 'max(ll&, int)'
   32 |         ans=max(ans,i+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:32:16: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   32 |         ans=max(ans,i+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:32:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   32 |         ans=max(ans,i+1);
      |             ~~~^~~~~~~~~
a.cc:36:24: error: no matching function for call to 'max(ll&, int)'
   36 |                 ans=max(ans,i+j+2);
      |                     ~~~^~~~~~~~~~~
/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:36:24: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   36 |                 ans=max(ans,i+j+2);
      |                     ~~~^~~~~~~~~~~
/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
/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:36:24: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   36 |                 ans=max(ans,i+j+2);
      |                     ~~~^~~~~~~~~~~