Zigzag Iterator

Similar Problems:

Given two 1d vectors, implement an iterator to return their elements alternately.

Example:

Input: v1 = [1,2] v2 = [3,4,5,6] Output: [1,3,2,4,5,6] Explanation: By calling next repeatedly until hasNext returns false, the order of elements returned by next should be: [1,3,2,4,5,6].

Follow up: What if you are given k 1d vectors? How well can your code be extended to such cases?

Clarification for the follow up question:

The “Zigzag” order is not clearly defined and is ambiguous for k > 2 cases. If “Zigzag” does not look right to you, replace “Zigzag” with “Cyclic”. For example:

Input: [1,2,3] [4,5,6,7] [8,9] Output: [1,4,8,2,5,9,3,6,7].

Github: code.dennyzhang.com

Credits To: leetcode.com

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- Solution:

**General Thinkings:**

**Key Observations:**

**Walk Through Testdata**

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