Main.cc:1:2: error: invalid preprocessing directive #inclde #inclde ^ Main.cc: In function 'int main()': Main.cc:6:2: error: 'cin' was not declared in this scope cin>>a; ^ Main.cc:8:3: error: 'cout' was not declared in this scope cout<<"YES"; ^ Main.cc:11:3: error: 'cout' was not declared in this scope cout<<"NO"; ^