Find the Number of Distinct Colors Among the Balls | Leetcode 3160

This video explains Find the Number of Distinct Colors Among the Balls using the most optimal counting hashmap approach.
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[@freecourseplatformenglish2829]

Solved it on my own, my approach is similar to your solution. Thanks for the explanation.

[@techdose4u]

Improving :)

[@atharva3433]

Sir aaj khudse solve kiya hai bohot acha laga
thoda hint use kiya but thanks to you for your help in my journey, its just been one month im maintaining my leetcode daily streak and doint other problems along with it as well

[@techdose4u]

great :)

[@WebDevAnjali]

bravo congrats! how long did it take u to come to this proficiency ?

[@programming6177]

asusual you gave awasome teaching. thank you bro😇

[@techdose4u]

welcome :)

[@mainakdasgupta7130]

thank you man

[@techdose4u]

welcome :)

[@deepakgarg9649]

Amazing Explanation!!

[@techdose4u]

Thanks :)

[@ShaikIrfan-ts1sg]

Superb explanation Sir... Obviously great

[@techdose4u]

Appreciate it!

[@mistercattington8597]

My intuition lead me to the hashmap + hashset approach but I hit TLE. I came here and listened to the first part of the lecture to see what I could be doing wrong and I tried again with the double hashmap approach but still hit TLE. The crucial steps were removing colors that drop to 0 frequency and using a length function on the hashmap. Avoid iterating over the frequency mapping! Great video!

[@techdose4u]

That's awesome! The TLE is a common mistake with this problem. It's all about optimizing the frequency mapping.

[@VIDITSHRIMALI-l8o]

Thank u sir for amazing code

[@techdose4u]

You're welcome! 😄

[@blazing-ansh]

i want to learn hashmap and mujhe hashmap par ek dam proper hat bethana hai to please suggest me how can i and please suggest some basic and medium questions and where to learn haspmap properly?

[@mr_kat1065]

First use chatgpt to understand what is haspmap...learn its syntax then go to the problem...this is what i did

[@abhaymandal4903]

Mine same approach , but was using array for tracking all balls with color . That lead me into MLE😅

[@techdose4u]

:)

[@nitheeshp.s2532]

I feel so demotivated, for few potd im able to think the solution but not able to solve but few questions i'm able to solve..what to do sir

[@techdose4u]

keep solving

[@praveendevireddy9954]

dont worry niteesh, i am able to solve few potd problems on my own, but could not solve this question like you. just keep solving. I dont have a friend to discuss problems and solve, if its okay then reply me

[@zenilkapadia7572]

❤

[@techdose4u]

Thanks :)

[@Anikait-h3d]

was using sets until i understood the reason for using hashmap

[@techdose4u]

nice