String-3 | 387. First Unique Character in a String | 🔥 Beginner, Medium & Advanced Level! скачать в хорошем качестве

String-3 | 387. First Unique Character in a String | 🔥 Beginner, Medium & Advanced Level!

JOIN MY WHATSAPP COMMUNITY FOR UPDATES: https://chat.whatsapp.com/BTlYJt2pCxj... Support me 🙌🏻: https://www.buymeacoffee.com/anuj.bar... Leetcode: https://leetcode.com/problems/first-u... Github Repo: https://github.com/team-codebug/leetcode Notes: https://github.com/team-codebug/leetc... 3 Months DSA for Placements! 🚀 Beginner to Advanced Playlist 🔍 Leetcode 387: First Unique Character in a String - HashMap Approach Explained! 🔍 🚀 In this video, we solve the First Unique Character in a String problem from Leetcode (#387) using the HashMap approach, ensuring an efficient solution in O(n) time complexity. ✅ HashMap Approach: 1️⃣ First Pass: Iterate through the string and store character frequencies in a HashMap. 2️⃣ Second Pass: Iterate again and return the index of the first character with a frequency of 1. 3️⃣ Optimized Solution: Uses O(n) time and O(1) space, as there are only 26 lowercase English letters. 📌 What You’ll Learn: ✔️ Problem statement & examples ✔️ Step-by-step coding walkthrough ✔️ Time & space complexity analysis ✔️ Edge cases and optimizations 📢 Subscribe for more coding solutions & DSA tips! 💬 Got questions? Drop a comment below, and let’s discuss! 🚀 🔖 Hashtags: #Leetcode #FirstUniqueCharacter #CodingInterview #DataStructures #Algorithms #Leetcode387 #Python #Java #CPlusPlus #DSA #SoftwareEngineering #CodingChallenge #InterviewPreparation #Programming #HashMapApproach #EfficientCoding =========================== ➡️ Connect with me: LinkedIn :   / anuj-kumar-9a188968   Instagram :   / mr.anuj.brandy   Discord :   / discord   ===========================