Language: C++

#include<bits/stdc++.h>
using namespase std;
int main(){
  int N;cin>>N;
  vector<string>S;for(int i=0;i<N;i++)cin>>S[i];
  vector<char>initials={'M','A','R','C','H'};
  vector<int>times(5,0);
  for(int i=0;i<N;i++){
    for(int j=0;j<5;j++){
      if(S[i][0]==initials[j])times[j]++;
    }
  }
  int ans=0;
  for(int a=0;a<5;a++){
    for(int b=a+1;b<N;b++){
      for(int c=b+1;c<N;c++){
        ans+=times[a]*times[b]*times[c];
      }
    }
  }

  cout<<ans;
}




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:4:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    4 |   int N;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:5:3: error: 'vector' was not declared in this scope
    5 |   vector<string>S;for(int i=0;i<N;i++)cin>>S[i];
      |   ^~~~~~
a.cc:5:3: 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:5:10: error: 'string' was not declared in this scope
    5 |   vector<string>S;for(int i=0;i<N;i++)cin>>S[i];
      |          ^~~~~~
a.cc:5:10: note: suggested alternatives:
In file included from /usr/include/c++/14/string:41,
                 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/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:5:17: error: 'S' was not declared in this scope
    5 |   vector<string>S;for(int i=0;i<N;i++)cin>>S[i];
      |                 ^
a.cc:6:10: error: expected primary-expression before 'char'
    6 |   vector<char>initials={'M','A','R','C','H'};
      |          ^~~~
a.cc:7:10: error: expected primary-expression before 'int'
    7 |   vector<int>times(5,0);
      |          ^~~
a.cc:10:19: error: 'initials' was not declared in this scope
   10 |       if(S[i][0]==initials[j])times[j]++;
      |                   ^~~~~~~~
a.cc:10:31: error: 'times' was not declared in this scope; did you mean 'timex'?
   10 |       if(S[i][0]==initials[j])times[j]++;
      |                               ^~~~~
      |                               timex
a.cc:17:14: error: 'times' was not declared in this scope; did you mean 'timex'?
   17 |         ans+=times[a]*times[b]*times[c];
      |              ^~~~~
      |              timex
a.cc:22:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   22 |   cout<<ans;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~