Amazon Onsite Second Round

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Second Round On-site Interview with Amazon

1st Question reorder linked list in this way

Given x1 -> x2 ->x3…-> y3 -> y2 -> y1
Reorder it to x1 -> y1 -> x2 -> y2 -> x3 -> y3 …..

Given 1 -> 2 -> 3 -> 4 -> 5
Return 1 -> 5 -> 2 -> 4 -> 3

2nd Question Design a parking lot.
Follow-up Question Find a data structure to sort out the empty space promptly. (Use HashMap> to pair up the car type with the empty slots available)

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