Marvin imnull

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I may be slow to respond.

imnull / gist:2219393

Created March 27, 2012 19:16 — forked from JeffreyZhao/gist:2216546

	// Please write an sequence list implements the interface with the required
	// time complexity described in the comments. The users can add the same
	// element as many times as they want, but it doesn't support the null item.
	// You can use any types in .NET BCL but cannot use any 3rd party libraries.
	// PS: You don't need to consider the multi-threaded environment.
	interface IMyList<T> : IEnumerable<T>
	{
	// O(1)
	// Add an item at the beginning of the list.
	void AddFirst(T item);