Snapshot Array

Explore the implementation of a Snapshot Array that supports setting values at indexes, taking snapshots, and retrieving values from historical snapshots. This lesson helps you understand how to design data structures that manage state changes over time, using efficient indexing and snapshot IDs.

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Statement

In this challenge, you have to implement a Snapshot Array with the following properties:

Constructor (length): This is the constructor and it initializes the data structure to hold the specified number of indexes.
Set Value (idx, val): This property sets the value at a given index idx to value val.
Snapshot(): This method takes no parameters and returns the Snap ID. Snap ID is the number of times that the snapshot function was called, less $1$ , as we start the count at $0$ . The first time this function is called, it saves a snapshot and returns $0$ . The $n^{th}$ ...