Language: C++

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

int main () {
  int N;
  cin >> N;
  vector<int> A(N);
  vector<int> B(N);
  vector<int> C(N - 1);
  for (int i = 0; i < N; i++) {
    cin >> A.at(i)
  }
  for (int i = 0; i < N; i++) {
    cin >> B.at(i)
  }
  for (int i = 0; i < N - 1; i++) {
    cin >> C.at(i)
  }
  int a
  a = -1
  int b
  b = 0
  int c
  c = -1
  for (int i = 0; i < N; i++) {
    a = a + 1
    b = b + B.at(A.at(a))
    if (c + 1 =  b + B.at(A.at(a))) {
      b = b + C.at(c)
    }
    c = b + B.at(A.at(a))
  }
  cout << b << endl;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namespase'
    2 | using namespase 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<int> A(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:7:10: error: expected primary-expression before 'int'
    7 |   vector<int> A(N);
      |          ^~~
a.cc:8:10: error: expected primary-expression before 'int'
    8 |   vector<int> B(N);
      |          ^~~
a.cc:9:10: error: expected primary-expression before 'int'
    9 |   vector<int> C(N - 1);
      |          ^~~
a.cc:11:12: error: 'A' was not declared in this scope
   11 |     cin >> A.at(i)
      |            ^
a.cc:14:12: error: 'B' was not declared in this scope
   14 |     cin >> B.at(i)
      |            ^
a.cc:17:12: error: 'C' was not declared in this scope
   17 |     cin >> C.at(i)
      |            ^
a.cc:20:3: error: expected initializer before 'a'
   20 |   a = -1
      |   ^
a.cc:25:19: error: 'i' was not declared in this scope
   25 |   for (int i = 0; i < N; i++) {
      |                   ^
a.cc:33:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   33 |   cout << b << 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:33:11: error: 'b' was not declared in this scope
   33 |   cout << b << endl;
      |           ^
a.cc:33:16: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   33 |   cout << b << 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)
      |     ^~~~