Kth Missing Positive Number | GFG POTD | Binary Search | Java

In this video, we solve GeeksforGeeks Problem of the Day – Kth Missing Positive Number in a Sorted Array using Binary Search in Java.

🔹 Problem Statement:
You are given:
A sorted array of distinct positive integers arr[]
An integer k
Your task is to find the kth positive number that is missing from the array

Optimized Approach Used:
1. Use Binary Search to find the smallest index where
missing numbers ≥ k
2. At any index mid,
missing = arr[mid] - mid - 1
3. Once the correct position is found,
Answer = index + k

📌 This avoids checking each missing number individually.

📌 Time Complexity:
O( log n )

📌 Space Complexity:
constant space O( 1 )

🔹 Resources
Problem Link: https://www.geeksforgeeks.org/problem...
Code Link: https://github.com/sibasundarj8/java-...

👉 This problem is a classic application of binary search on answer and is frequently asked in coding interviews.

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