/in/foo.cc:2:7: error: expected nested-name-specifier before 'namspace'
 using namspace std;
       ^~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:4:8: error: 'cin' was not declared in this scope
 {int n;cin>>n;
        ^~~
/in/foo.cc:4:8: note: suggested alternative:
In file included from /in/foo.cc:1:0:
/usr/include/c++/7/iostream:60:18: note:   'std::cin'
   extern istream cin;  /// Linked to standard input
                  ^~~
/in/foo.cc:5:2: error: 'cout' was not declared in this scope
  cout<<n/(60*60*24)<<" "<<n%(60*60*24)/(60*60)<<" "<<n%(60*60*24)%(60*60)/60<<" "<<n%60;
  ^~~~
/in/foo.cc:5:2: note: suggested alternative:
In file included from /in/foo.cc:1:0:
/usr/include/c++/7/iostream:61:18: note:   'std::cout'
   extern ostream cout;  /// Linked to standard output
                  ^~~~