View Compilation Error

0_0_31146609_27861.cpp: In function 'int main()':
0_0_31146609_27861.cpp:6:2: error: 'cin' was not declared in this scope
  cin >> n;
  ^
0_0_31146609_27861.cpp:11:4: error: 'cout' was not declared in this scope
    cout << "advertise" << endl;
    ^
0_0_31146609_27861.cpp:11:27: error: 'endl' was not declared in this scope
    cout << "advertise" << endl;
                           ^
0_0_31146609_27861.cpp:16:4: error: 'cout' was not declared in this scope
    cout << "does not matter" << endl;
    ^
0_0_31146609_27861.cpp:16:33: error: 'endl' was not declared in this scope
    cout << "does not matter" << endl;
                                 ^
0_0_31146609_27861.cpp:20:3: error: 'cout' was not declared in this scope
   cout << "do not advertise" << endl;
   ^
0_0_31146609_27861.cpp:20:33: error: 'endl' was not declared in this scope
   cout << "do not advertise" << endl;
                                 ^