Language: C++

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

int main(){
  int N;
  cin >> N;
  vector<vector<int>> data(2, vector<int> (N));
  for(int i = 0; i < 2; i++){
    for(int j = 0; j < N; j++){
      cin >> data.at(i).at(j);
    }
  }
  ame = 0;
  for(int i = 0; i < N; i++){
    for(int j = 0; j <= i; j++){
      int ame1 += data.at(0).at(j);
    }
    for(int k = i; k < N; k++){
      ame1 += data.at(1).at(k);
    }
    if(ame1 > ame) ame = ame1;
  }
  cout << ame << endl;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namesapce'
    2 | using namesapce std;
      |       ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |   cin >> N;
      |   ^~~
      |   std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:7:3: error: 'vector' was not declared in this scope
    7 |   vector<vector<int>> data(2, vector<int> (N));
      |   ^~~~~~
a.cc:7:3: note: suggested alternatives:
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53:
/usr/include/c++/14/bits/stl_vector.h:428:11: note:   'std::vector'
  428 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
/usr/include/c++/14/vector:93:13: note:   'std::pmr::vector'
   93 |       using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
      |             ^~~~~~
a.cc:7:17: error: expected primary-expression before 'int'
    7 |   vector<vector<int>> data(2, vector<int> (N));
      |                 ^~~
a.cc:10:14: error: 'data' was not declared in this scope; did you mean 'std::data'?
   10 |       cin >> data.at(i).at(j);
      |              ^~~~
      |              std::data
In file included from /usr/include/c++/14/string:53,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/bits/range_access.h:344:5: note: 'std::data' declared here
  344 |     data(initializer_list<_Tp> __il) noexcept
      |     ^~~~
a.cc:13:3: error: 'ame' was not declared in this scope
   13 |   ame = 0;
      |   ^~~
a.cc:16:16: error: expected initializer before '+=' token
   16 |       int ame1 += data.at(0).at(j);
      |                ^~
a.cc:19:7: error: 'ame1' was not declared in this scope
   19 |       ame1 += data.at(1).at(k);
      |       ^~~~
a.cc:19:15: error: 'data' was not declared in this scope; did you mean 'std::data'?
   19 |       ame1 += data.at(1).at(k);
      |               ^~~~
      |               std::data
/usr/include/c++/14/bits/range_access.h:344:5: note: 'std::data' declared here
  344 |     data(initializer_list<_Tp> __il) noexcept
      |     ^~~~
a.cc:21:8: error: 'ame1' was not declared in this scope
   21 |     if(ame1 > ame) ame = ame1;
      |        ^~~~
a.cc:23:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   23 |   cout << ame << endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:23:18: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   23 |   cout << ame << endl;
      |                  ^~~~
      |                  std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~