Language: C++

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

typedef long long ll;
typedef pair <int , int> pii;

const int N = 2e5+10 , mod = 1e9+7;

int32_t main(){
   ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
   int n , m , k;
   cin >> n >> m >> k;
   int 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 <ll> v;
   ll sum = 0;
   int ans = 0;
   for(int i = 0 ; i < n ; i++){
      sum += a[i];
      v.push_back(sum);
      if(sum <= k)
         ans = max(ans , i + 1);
   }
   sum = 0;
   for(int i = 0 ; i < m ; i++){
      sum += b[i];
      if(sum <= k){
         ans = max(ans , i + 1 + (upper_bound(v.begin() , v.end() , k - sum) - v.begin()));
      }
   }
   cout << ans;
   return 0;
}


Compiler output:
a.cc: In function 'int32_t main()':
a.cc:31:19: error: no matching function for call to 'max(int&, __gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >::difference_type)'
   31 |          ans = max(ans , i + 1 + (upper_bound(v.begin() , v.end() , k - sum) - v.begin()));
      |                ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:31:19: 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'})
   31 |          ans = max(ans , i + 1 + (upper_bound(v.begin() , v.end() , k - sum) - v.begin()));
      |                ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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:31:19: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   31 |          ans = max(ans , i + 1 + (upper_bound(v.begin() , v.end() , k - sum) - v.begin()));
      |                ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~