First Unique Character in a String | Easy | Leetcode 387
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This is the 20th Video of our Playlist "Leetcode Easy".
In this video we will try to solve a normal practice problem - First Unique Character in a String | Leetcode 387
I will explain the intuition so easily that you will never forget and start seeing this as cakewalk EASYYY.
We will do live coding after explanation and see if we are able to pass all the test cases.
Also, please note that my Github solution link below contains both C++ as well as JAVA code.
Problem Name : First Unique Character in a String | Leetcode 387
Company Tags : Amazon
My solutions on Github(C++ & JAVA) : https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/strings/Easy%20Tagged/First%20Unique%20Character%20in%20a%20String.cpp
Leetcode Link : https://leetcode.com/problems/first-unique-character-in-a-string
My DP Concepts Playlist : https://youtu.be/7eLMOE1jnls
My Graph Concepts Playlist : https://youtu.be/5JGiZnr6B5w
My GitHub Repo for interview preparation : https://github.com/MAZHARMIK/Interview_DS_Algo
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Approach Summary : The approach involves initializing an array of size 26 to store the count of occurrences for each lowercase letter. The code then iterates through the string to populate the array. In a subsequent loop, it checks the count in the array for each character and returns the index of the first character with a count of 1, indicating uniqueness. If no unique character is found, the function returns -1. The approach efficiently utilizes an array to track character frequencies and provides a concise solution to the problem.
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✨ Timelines✨
00:00 - Introduction
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