Run id: 120726

Main.cc: In function 'int main()':
Main.cc:3:5: error: 'cin' was not declared in this scope
     cin>>a;
     ^
Main.cc:5:5: error: 'cout' was not declared in this scope
     cout<<"NO";
     ^
Main.cc:8:5: error: 'cout' was not declared in this scope
     cout<<"YES";
     ^