2190. Most Frequent Number Following Key in an Array | EASY LeetCode Explanation & Python Solution

Описание: In this video, we solve LeetCode 2190 — Most Frequent Number Following Key in an Array with a clear and beginner-friendly explanation.
We walk through how to track frequencies, how to identify numbers that follow a specific key, and how to implement the solution efficiently in Python.

🔍 What you’ll learn:

How to iterate efficiently over an array

How to use a frequency map (dictionary)

How to handle edge cases

Clean and optimal Python implementation

This problem is perfect for beginners and intermediates preparing for coding interviews or improving algorithm skills.

⏱ Difficulty: Easy
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