First Letter to Appear Twice LeetCode - Java

In this video, I walk through the "First Letter to Appear Twice" LeetCode problem using Java.

Timestamps:
00:00 - Intro
00:05 - Problem Explanation
00:36 - Brute Force Solution
02:32 - Brute Force Big O
03:45 - Optimized Solution
05:12 - Optimized Big O
05:55 - Outro

Please like and subscribe if you found this helpful! Let me know in the comments what problem I should do next :)

#leetcode #firstlettertoappeartwice #javaprogramming #codinginterview #datastructures #set #hashset #twopointers #bigO

[Aypy]

public class Hello
{
public static void main(String [ ] args)
{
System.out.println("Hello Fine Shyt");
}
}

[shaneumayanga]

awesome! can you do more array questions?

[alec-dora]

You should switch the frames and make your video full screen. I only watched to see you.

[Sagar-omf]

Hey Mam
I can design an eyecatching thumbnails for your channel.
Reply if intersted