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Decode the Coding Interview in Java: Real-World Examples

DIY: Snapshot Array

Understand how to implement the SnapshotArray data structure with key methods set, snapshot, and get. Explore managing multiple versions of arrays efficiently, a common coding interview problem. This lesson helps you develop skills to handle dynamic data snapshots and retrieve historical values with ease.

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Problem statement

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

  • SnapshotArray(length): This property initializes a data structure with length number of indexes. Initially, the value at each index is 0.

  • set(idx, val) ...