260. Single Number III || LeetCode POTD || Explained in HINDI

Instagram link:- https://www.instagram.com/reelcoding/ https://www.youtube.com/@reelcoding?sub_confirmation=1 Given an array of integers nums, where exactly two elements appear only once and all the other elements appear exactly twice, our task is to find these two unique elements. Approach 1 Initialize a HashMap: We use a HashMap to keep track of the frequency of each element in the array. Populate the HashMap: Traverse through the array and update the count of each element in the HashMap. Identify Unique Elements: Iterate through the entries of the HashMap to find the elements that appear exactly once. Store the Result: Store the unique elements in an array and return it. Time and Space Complexity Time Complexity: The algorithm runs in O(n) time, where n is the length of the array nums. This is because we traverse the array once to populate the HashMap and again to identify the unique elements. Space Complexity: The space complexity is O(n) due to the additional storage required for the HashMap, which in the worst case stores all elements of the array. Approach 2 Calculate XOR of All Elements: First, we XOR all the elements in the array. The result, getXor, will be the XOR of the two unique numbers since all the duplicate numbers will cancel each other out. Find a Distinguishing Bit: Identify the rightmost set bit (1) in getXor. This bit is different between the two unique numbers. We use lowestBit = getXor & (-getXor) to get this bit. Separate the Numbers: Initialize an array ans of size 2 to store the unique numbers. Traverse through the array again and use the distinguishing bit to separate the numbers into two groups. XOR all the numbers in each group to get the two unique numbers. Time and Space Complexity Time Complexity: The algorithm runs in O(n) time, where n is the length of the array nums. This is because we traverse the array twice—once to calculate the XOR and once to separate the numbers. Space Complexity: The space complexity is O(1) since we are using a fixed amount of extra space for the variables and the result array. Whether you're new to problem-solving or seeking insights into Java programming techniques, this video offers valuable insights into tackling similar challenges effectively. Do join with me guys for daily problem solving on LeetCode. Please like and subscribe this channel and share among your friends, it helps me to motivate and bring more videos for you guys. ❤️❤️ Soon, DSA batch (Hinglish) is going to launch on this channel. So, do subscribe so that you will get the notification for all new videos.👍👍🔔🔔. Do comment if any doubts left. Thank you 😊 #leetcode #computerscience #leetcodesolutions #leetcodequestionandanswers #code #learning #dsalgo #dsa #CodingExplanation #AlgorithmTutorial #JavaProgramming #DataStructures #DynamicProgramming #CodeExplanation #ProgrammingTutorial #AlgorithmExplanation #TechTutorial #LearnToCode #ProblemSolving #ProgrammingConcepts #SoftwareDevelopment #TechEducation #CodingCommunity #CodeBreakdown #ComputerScience #JavaTutorial #AlgorithmAnalysis #EducationalContent 260. Single Number III Leetcode 260 Single Number III Leetcode daily challenge Leetcode potd 260 Single Number III leetcode potd today solution leetcode potd today leetcode grind leetcode questions for interview leetcode series leetcode hindi

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