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 returnsfalse, 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].