Find the Kth Missing Positive Number | Binary Search & Simple Logic Explained in JavaScript

Описание: In this video, we solve the Kth Missing Positive Number problem using two powerful methods — a simple O(n) approach and an optimized O(log n) binary search approach.
Learn how to calculate missing elements in a sorted array efficiently using smart math tricks.

📘 Topics Covered:

Missing numbers in sorted array

Binary search logic

JavaScript coding interview question

Step-by-step dry run

Example Inputs:

arr = [2,3,4,7,11], k = 5 → Output: 9 arr = [1,2,3,4], k = 2 → Output: 6

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