using System;

namespace kuku
{
	public 
#if !DEBUG 
		abstract 
#endif
		class a
	{
		public 
#if !DEBUG 
			abstract
#else
			virtual
#endif
			int f { get {return 1;} }
	}
	public class b : a
	{
	}
	public class c : b
	{
		public override int f { get {return 3;} }
	}
}