运行 ID: 37083

Main.cc:2:1: error: ‘sing’ does not name a type; did you mean ‘uint’?
 sing namespace std;
 ^~~~
 uint
Main.cc: In function ‘int main()’:
Main.cc:4:5: error: ‘cout’ was not declared in this scope
     cout<<"5050";
     ^~~~
Main.cc:4:5: note: suggested alternative:
In file included from Main.cc:1:0:
/usr/include/c++/7/iostream:61:18: note:   ‘std::cout’
   extern ostream cout;  /// Linked to standard output
                  ^~~~