运行 ID: 74277

Main.cc:2:7: error: expected nested-name-specifier before ‘namepsace’
 using namepsace std;
       ^~~~~~~~~
Main.cc: In function ‘int main()’:
Main.cc:7:4: error: ‘cin’ was not declared in this scope
    cin>>n>>m;
    ^~~
Main.cc:7:4: note: suggested alternative:
In file included from Main.cc:1:0:
/usr/include/c++/7/iostream:60:18: note:   ‘std::cin’
   extern istream cin;  /// Linked to standard input
                  ^~~
Main.cc:10:6: error: ‘cout’ was not declared in this scope
      cout<& __os)
     ^~~~
Main.cc:14:6: error: ‘cout’ was not declared in this scope
      cout<& __os)
     ^~~~