运行 ID: 85499

Main.cc: In function ‘int main()’:
Main.cc:5:5: error: ‘cout’ was not declared in this scope
     cout<<"YES";
     ^~~~
Main.cc:5:5: 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
                  ^~~~
Main.cc:4:9: warning: unused variable ‘a’ [-Wunused-variable]
     int a, b; 
         ^
Main.cc:4:12: warning: unused variable ‘b’ [-Wunused-variable]
     int a, b; 
            ^