Maximum Count of Positive Integer and Negative Integer | Leetcode 2529 | codestorywithMIK

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Published on March 12, 2025 3:39:26 AM ● Video Link: https://www.youtube.com/watch?v=UzMHKxngSy0

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Hi Everyone, this is the 8th video of our Playlist "Solving only using C++ STLs/JAVA JCF".
Now we will be solving a very easy problem - Maximum Count of Positive Integer and Negative Integer | Learn Something New | Leetcode 2529 | codestorywithMIK

Since this is a very easy problem, I have explained how to do it using STLs/JCF only. We will learn a lot of things from this video.

Problem Name : Maximum Count of Positive Integer and Negative Integer | Learn Something New | Leetcode 2529 | codestorywithMIK
Company Tags : will update later
My solutions on Github(C++ & JAVA) : https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/Arrays/Leetcode Easy/Maximum Count of Positive Integer and Negative Integer.cpp
Leetcode Link : https://leetcode.com/problems/maximum-count-of-positive-integer-and-negative-integer


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Video Summary :
Approach 1 (Using STL count_if)
This approach counts positive and negative numbers separately using the count_if function with lambda expressions. It then returns the maximum of the two counts, ensuring we find the dominant sign in the array.

Approach 2 (Using lower_bound)
This approach leverages binary search to find the first occurrence of 1 (for positives) and 0 (for non-negatives). Using these indices, it determines the count of positive and negative numbers efficiently and returns the maximum of the two.


✨ Timelines✨
00:00 - Introduction
0:18 - Motivation
0:40 - Problem Explanation
1:34 - C++ count_if()
5:14 - JAVA stream and filters
12:49 - Coding C++ & Java using count
16:29 - Follow Up using Binary Search
18:19 - C++ lowerbound
23:15 - Java apnaLowerBound
27:03 - Coding C++ Java follow up

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