Zero Sum Subarray | HashMap Data Structures | GeeksforGeeks Placement Interview Question смотреть онлайн

In this video, we will be solving the Zero Sum Subarray problem and how to find if there is any subarray with a sum equal to 0 in O(N) time complexity. This is an Important Placement Interview Question and a popular GeeksforGeeks DSA problem.

The zero-sum subarray problem is a popular DSA algorithmic problem in computer science, and it asks us to find if there is any subarray in the given array that has a sum of zero. This problem can be solved using various techniques, but in this video, we will discuss an efficient approach that has a time complexity of O(N) using prefix sum and the HashMap method.

We will start with an explanation of the problem statement and some basic concepts related to it. Then we will move on to the algorithmic approach and the step-by-step procedure to solve this problem and also see the Bruteforce solution. We will also provide a code implementation of the solution.

After that, we will discuss the time and space complexity of our solution, and compare it with some other approaches to this problem. Finally, we will conclude the video with a summary of the key points discussed and some additional resources for further learning.

Problem Statement:
“Zero Subarray Sum”, using the prefix sum approach, the problem states that - You are given N array integers and you have to find if there is any subarray with a sum equal to zero. Expected Time Complexity: O(N).

GeeksforGeeks Problem: https://www.geeksforgeeks.org/find-if-there-is-a-subarray-with-0-sum/

Link to notes in the video: https://drive.google.com/file/d/1rV883grEmYOn8Gumic_9fxuYK_7pldvE/view?usp=sharing

Link to similar questions, which can be solved after seeing this video:

Count of subarrays with zero-sum: https://www.pepcoding.com/resources/data-structures-and-algorithms-in-java-levelup/hashmap-and-heaps/count-of-all-subarrays-with-zero-sum-official/ojquestion

Largest subarray with zero-sum: https://www.interviewbit.com/problems/largest-continuous-sequence-zero-sum/

Timestamps:
00:00 Introduction
00:36 Problem Description
01:22 Bruteforce solution
03:25 Insights
07:26 Pseudocode
14:01 Time and Space Complexity
14:46 Extra Questions and Notes

Other DSA Interview Questions Solved: https://youtube.com/playlist?list=PL05sYGJyIXMqj9s4T1uaJbiXCAfj4z8uv

#SubarraySum #Hashmap #geeksforgeeks #interviewquestions #codewithscaler #dsa #interviewpreparation #scaler #arrays #datastructures

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