Single Number - LeetCode 136 - Blind 75 - Bit Manipulation

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The problem is that they give us a non-empty array of integers, and he task is to find the element that appears only once in the array.

To solve this Problem We will be using 3 Techniques, the first one is HashSet, the second one is by using Mathematical Formula and the last one by using the XOR operator.

To solve this Problem we will use The Sieve of Eratosthenes Algorithm.
Next, we present the solution and walk you through the code step by step, highlighting the key points and explaining the logic behind each part of the solution.

Whether you are preparing for a technical interview or just looking to improve your coding skills, this video is a great resource.

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Understanding The Problem : (0:00)
Brute Force Approach (HashSet) : (0:42)
Complexity Analysis : (1:36)
Mathematical Formula : (1:49)
Complexity Analysis : (3:03)
The XOR operator : (3:15)
Complexity Analysis : (4:48)
Code Explanation (HashSet): (5:01)
Code Explanation (Math) : (5:36)
Code Explanation (XOR ) : (5:50)