Kth Missing Positive Number (LeetCode 1539) | Full Solution with intuition, animations and visuals

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Actual Problem: leetcode.com/problems/kth-mis...
Chapters:
00:00 - Intro
00:44 - Problem Statement
03:47 - Thought process
09:02 - One more test case
12:26 - Using Binary Search
13:52 - Dry-run of Code
15:04 - A special case
17:13 - Final Thoughts
📚 Links to topics I talk about in the video:
Array Data Structure: • Array Data Structure e...
Binary Search: • Binary Search Algorith...
Divide and Conquer: • Divide and Conquer alg...
What is Big O?: • Big O Notation Simplif...
Time Complexity of an algorithm: • What is the Time Compl...
Other Problems on Arrays: • Arrays
📘 A text based explanation is available at: studyalgorithms.com
Code on Github: github.com/nikoo28/java-solut...
Test-cases on Github: hgithub.com/nikoo28/java-solut...
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Get started for interview preparation: amzn.to/44Nn5du
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[@Iam_Srikanth_009]

Really this guy needs a lot of support.... Thank you for explaining this problem and making me to understand it 😊. Really hats off for your explanation

[@nikoo28]

Thanks for all the support and motivation

[@DharaniChavala]

very nice and clear explanation.

[@gpraneeth7693]

Helped a lot

[@subee128]

Thank you very much

[@unknownman1]

Thanks !

[@vipul20465]

Hey Nikhil, Thanks for the awesome explanation. I attempted to come up with a brute-force solution as per the explanation provided in the video to locate the kth positive element, but unfortunately, it's not passing all of the test cases. Could you please share the brute-force implementation of this problem.

[@rambhaktuchihaobito7987]

Thank you ..sir❤❤

[@Adeetisharma-nu8jg]

thankyou so much

[@sumangupta5292]

The explanation is excellent. However I have 2 questions - 1. Why we take right as arr.length and not arr.length-1 , 2. How did we arrive at return left + k?

[@nikoo28]

1. to get a mid value, you are actually looking at the number of elements, and not the index. Thus, right will be the actual array length. 2. adding k to the 'left' will actually land you at the missing number.

[@sksabir8063]

🤩

[@adityaarya3249]

Why didn't you take right = arr.length -1;

[@sumangupta5292]

I have the same question. Generally we take right pointer as arr.length-1

[@je2587]

@@sumangupta5292 not sure if this answers your question but since we do while(left < right), we need to do right=arr.length before. If you go with arr.length-1, you would go with while(left

[@jayeshpatil5757]

19:04, 10 July , watching. Red cloth washed at 18:53,10 July.