Language: C++

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

typedef long long ll;

#define MOD 1000000007

int main() {
  int n;
  cin >> n;
  vector<int> p(n);
  for (int i = 0; i < n; ++i) {
    cin >> p[i];
  }
  vector<int> mn(n);
  mn[0] = p[0];
  for (int i = 1; i < n; ++i) {
    mn[i] = min(mn[i - 1], p[i]);
  }
  int ans = 0;
  for (int i = 0; i < n; ++i) {
    if (p[i] <= mn[i]) ans++;
  }
  cout << ans << endl;
  return 0;
}


Compiler output:
a.cc:2:16: error: expected identifier before ';' token
    2 | using namespace;
      |                ^
a.cc: In function 'int main()':
a.cc:10:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
   10 |   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:11:3: error: 'vector' was not declared in this scope
   11 |   vector<int> p(n);
      |   ^~~~~~
a.cc:11:3: 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:11:10: error: expected primary-expression before 'int'
   11 |   vector<int> p(n);
      |          ^~~
a.cc:13:12: error: 'p' was not declared in this scope
   13 |     cin >> p[i];
      |            ^
a.cc:15:10: error: expected primary-expression before 'int'
   15 |   vector<int> mn(n);
      |          ^~~
a.cc:16:3: error: 'mn' was not declared in this scope; did you mean 'n'?
   16 |   mn[0] = p[0];
      |   ^~
      |   n
a.cc:16:11: error: 'p' was not declared in this scope
   16 |   mn[0] = p[0];
      |           ^
a.cc:18:13: error: 'min' was not declared in this scope; did you mean 'std::min'?
   18 |     mn[i] = min(mn[i - 1], p[i]);
      |             ^~~
      |             std::min
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51:
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: 'std::min' declared here
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
a.cc:24:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   24 |   cout << ans << 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:24:18: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   24 |   cout << ans << 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)
      |     ^~~~