运行 ID: 41380

Main.cc:2:7: error: expected nested-name-specifier before ‘namepace’
 using namepace std;
       ^~~~~~~~
Main.cc: In function ‘int main()’:
Main.cc:12:9: error: ‘cin’ was not declared in this scope
         cin >> x;
         ^~~
Main.cc:12:9: note: suggested alternative:
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:75:0,
                 from Main.cc:1:
/usr/include/c++/7/iostream:60:18: note:   ‘std::cin’
   extern istream cin;  /// Linked to standard input
                  ^~~
Main.cc:15:10: error: ‘cout’ was not declared in this scope
          cout << -i;
          ^~~~
Main.cc:15:10: note: suggested alternative:
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:75:0,
                 from Main.cc:1:
/usr/include/c++/7/iostream:61:18: note:   ‘std::cout’
   extern ostream cout;  /// Linked to standard output
                  ^~~~
Main.cc:24:5: error: ‘cout’ was not declared in this scope
     cout << ans;
     ^~~~
Main.cc:24:5: note: suggested alternative:
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:75:0,
                 from Main.cc:1:
/usr/include/c++/7/iostream:61:18: note:   ‘std::cout’
   extern ostream cout;  /// Linked to standard output
                  ^~~~