Solution: Time Based Key-Value Store

Explore how to implement a time-based key-value store that supports setting and retrieving values for keys at different timestamps. Learn the difference between naive and optimized approaches, focusing on binary search and dictionary data structures. Understand how to efficiently handle queries with timestamps, analyze time and space complexity, and strengthen your ability to solve custom data structure problems in coding interviews.

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Statement
Solution
- Naive approach
- Optimized approach using binary search

Statement

Implement a data structure that can store multiple values of the same key at different timestamps and retrieve the key’s value at a certain timestamp.

You’ll need to implement the TimeStamp class. This class has the following functions:

Init(): This function initializes the values dictionary and timestamp dictionary.
Set Value(key, value, timestamp): This function stores the key and value at any given timestamp.
Get Value(key, timestamp): This function returns the value set for this key at the specified timestamp.

Note: When a query requests the value of a key at a timestamp that isn’t recorded, return the value corresponding to the most recent timestamp before the query’s timestamp. If there are no timestamps before the query’s timestamp, return an empty string.

Constraints:

$1 \leq$ key.length, value.length $\leq 20$
key and value consist of lowercase English letters and digits.
$1 \leq$

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