LOVE BABBAR 450 questions series

general
#1

I have decided to solve all 450 questions that Love Babbar had shared on his YouTube channel.

Here is a collection of all my playlists, do check them out:
https://studio.youtube.com/channel/UCDE2tF6E_isqQRJ0ClqnTkg/playlists

Please share the video with your friends and subscribe to my channel!.
More videos to follow on the same topic.
Scroll down to watch the videos is sequential manner.
Watch the videos till the end guys!.

Stay tuned.
Thanks

Playlist link:

Questions link:

Part 1:

part 2 is now uploaded:

part 3 is uploaded now, sorry for being late today.

Part 4 is uploaded. Please let me know if you are able to understand.

Part 5 is uploaded:

Part 6 is uploaded now:

Part 7 is uploaded:

Part 8 is uploaded:

Part 9 is uploaded. Matrix problems begins today!.
https://youtu.be/14Sy9ENqVLI

Part 10 is uploaded now. Check it out!.
https://youtu.be/jkUQW-BvhFs

Part 11 is uploaded. Matrix is completed.
Next will be strings!.
https://youtu.be/suGaX9U56i8

Part 12 is uploaded. Strings has started.
https://youtu.be/lV93-n_QzJc

Part 13 is uploaded. Sorry for being late today.
I was busy with college stuff.
https://youtu.be/uFptnGp_mu0

Part 14 is uploaded now.
https://youtu.be/ky9U3UAWhow

Part 15 is uploaded now.
https://youtu.be/xvjttny2cA4

Part 16 is uploaded.
There was a net error could not correct code in the video.
The corrected code is here:

Watch the video completely guys.
https://youtu.be/PYN9auuqyLU

Part 17 is uploaded.
If you want me to show the coding part let me know i shall make a separate video.
I want you guys to try it first.
https://youtu.be/IlfBcczfcK4

Part 18 is uploaded:
https://youtu.be/HesIpSP61fU

Part 19 is uploaded:
https://youtu.be/QVEIcsqO6FU

Part 20 is uploaded guys.
All the solutions can be found in the video description.
Thanks for supporting me so far.
Like ,share and subscribe.
https://youtu.be/U9QqK2WagpQ

Part 21 is uploaded guys.
https://youtu.be/vwCVjdcrUmc

Part 22 is uploaded.
Like share and subscribe.
Thanks.
https://youtu.be/-dI1BtVmCpM

Part 23 is uploaded guys.
Watch the video till the end.
https://youtu.be/HVYDN_3dh70

Part 24 is uploaded.
Strings is almost done.

Like ,share and subscribe guys.
Watch till the end!!.
https://youtu.be/dSwy23O7uqI

Part 25 is uploaded guys.
We have completed strings.
Thanks for sticking around so far.
Please continue to do so.
Like, share and subscribe.

https://youtu.be/bZMatdmMiNc

Part 26 is uploaded
sorting and searching has started.
Like share and subscribe.
https://youtu.be/F0aEELBaCqk

Part 27 is uploaded.
Try to code the last problem by yourself first and then check my solution for reference.
Like,share and subscribe.
https://youtu.be/ityTI0EbWwg

Part 28 is uploaded.
Last problem has 6 different approaches.
I suggest you to go and find out atleast 2 to 3 more.
Like, share and subscribe.
https://youtu.be/_HPJIHe7xA0

Part 29 is uploaded.
First question is asked in interviews frequently.
That’s what everyone says.
Check it out!.
Like share and subscribe.
https://youtu.be/R6PIy9RjdHM

Part 30 is uploaded.
Try the homework problem by referring to the easier version of the same concept(2sum,3sum)
Like share and subscribe.
https://youtu.be/s2iuUuDX1BI

Part 31 is uploaded.
For the last problem i shall tell the O(1) space approach in the next video.
Like share and subscribe.
https://youtu.be/xI1TEbJEDRs

Part 32 is uploaded.
Watch the video that i have mentioned in the description box.
Like share and subscribe.
https://youtu.be/99U6QDWgF7g

Part 33 is uploaded.
You should know how to implement certain functions without stl.
IN Interviews(technical) it will help you a lot.
Like share and subscribe.
https://youtu.be/3zImAyVQlTQ

Part 34 is uploaded.
Check if the solutions are correct for all test cases.
Like share and subscribe.
https://youtu.be/zSowR7ARTtQ

Part 35 is uploaded.
Help needed please watch video till the end.
Like share and subscribe.
https://youtu.be/beZhSQfslE4

Part 36 is uploaded.
Like share and subscribe.
Please learn job scheduling problem for tomorrow.
https://youtu.be/7htmBk8l5Bs

Part 37 is uploaded.
Interview favourite must watch.
Sorry for only one question.
I hope you corrected my mistakes. Please watch complete video.
Like share and subscribe.
https://youtu.be/FXmWu_KwPK0

Part 38 is uploaded.
Think slowly and calmly for this problem. Try different approaches.
Please watch the video for longer guys.
Like share and subscribe.
https://youtu.be/6goC47cUPvI

Part 39 is uploaded.
Please solve the problems with concentration as it will help you solve any kind of such problems later on.
Like share and subscribe.
https://youtu.be/bDTufsj1Cic

Part 40 is uploaded.
Did we do a similar problem??. Refresh yourself
Like the video, share it with all your friends and please subscribe.
https://youtu.be/S02aw1VwP-c

Part 41 is uploaded.
Please think if we need to think in a complicated way or not for this problem.
Try other approaches as well.
Like share and subscribe guys!.
Thanks
https://youtu.be/meh3V0JYaTw

Part 42 is uploaded.
Let me know if I have missed any question.
Next is link list.
Like , share and subscribe.
https://youtu.be/W-FjyHDE_bg

Linked list has started!!.
Part 43 is uploaded.
Please watch the full video and correct my diagram explanation.
Dont forget to try out the homework problem!.
Like share and subscribe.
https://youtu.be/QPjSXZ2tr6U

Part 44 is uploaded.
Small revision was done. Please solve the questions parallelly.
Like share and subscribe.
https://youtu.be/IVi5QxGhoKE

Part 45 is uploaded.
Easy level problems.
Like share and subscribe!.
https://youtu.be/0sz8JkZxXZI

Part 46 is uploaded.
Make your concepts crystal clear.
Like share and subscribe!.
https://youtu.be/GmxyCjELpUc

Part 47 is uploaded.
Solving problems efficiently is the key to success in interviews
Like share and subscribe!.
https://youtu.be/J1vgrroDWAQ

Part 48 is uploaded.
Practice these king of problems with concentration.
I have given you a direction. Go forward with it.
Like share and subscribe!.
https://youtu.be/C5dh8kXQOT4

Part 49 is uploaded.
Space optimization is the key in technical interviews.
Like share and subscribe!.
https://youtu.be/o3EjLS46hoY

Part 50 is uploaded.
These are some typical problems. Try them by yourself first.
Like share and subscribe!.
https://youtu.be/nGf-g-q01pw

Part 51 is uploaded.
Good revision of concepts. Try them by yourself first.
Like share and subscribe!.
https://youtu.be/FSjoZDs2ces

Part 52 is uploaded.
Easy concept just requires a bit of concentration. Try it by yourself first.
Like share and subscribe!.
https://youtu.be/BY5B2iI4IOA

Part 53 is uploaded.
I thought i could do the last one, but then realized I would rush it.
So tomorrow we shall do it. But you can always do it before me!!.
Like share and subscribe!.
https://youtu.be/0UX5_mXzrC4

Part 54 is uploaded.
Some new type of problem(I had never seen before). Simple only. Just focus!.
Like share and subscribe!.
https://youtu.be/xsU9ppiSNto

Part 55 is uploaded.
One solution on gfg is wrong in my opinion. Watch the video to find out more.
Like share and subscribe!.
https://youtu.be/bh9xAIQ-XdI

Part 56 is uploaded.
I dont know how to use linked list for one question.Help me out!. Watch full video.
Like share and subscribe!.
https://youtu.be/rHy02dA-2MY

Part 57 is uploaded.
Next is Binary tress. Stay tuned!.
Like share and subscribe!.
https://youtu.be/eslujn63br8

Part 58 is uploaded.
Binary trees has started.
Recursion can be your best friend over here!.
Like share and subscribe!.
https://youtu.be/FcYYloDkCwI

Part 59 is uploaded.
Easy problem.
Like share and subscribe!.
https://youtu.be/3cQ5PWOiMcA

Part 60 is uploaded.
Basics of data structures is a must to solve such kind of problems.
Like share and subscribe!.
https://youtu.be/wqvXp2C4Da4

Part 61 is uploaded.
Simple typical problem.
Like share and subscribe!.
https://youtu.be/e57zxp4sTxM

Part 62 is uploaded.
Easy problems. Get them in the first try!.
Like share and subscribe!.
https://youtu.be/hr8oC774IgY

Part 63 is uploaded.
Use your previous experiences to solve the problems.
Like share and subscribe!.
https://youtu.be/dPb3uHGsCZw

Part 64 is uploaded.
Did a small recap of yesterdays problem. Today’s problem is quite interesting. try it by yourself once!.
Like share and subscribe!.
https://youtu.be/6qJgWSpoO-M

Part 65 is uploaded.
Simple concept. You need to visualize the tree in 3D!
Like share and subscribe!.
https://youtu.be/-yHJPoJFuOs

Part 66 is uploaded.
All problems just require you to know basics of programming and recursion.
Like share and subscribe!.
https://youtu.be/6h6NSjaHemw

Part 67 is uploaded.
Recursion is your best friend!.
Like share and subscribe!.
https://youtu.be/oVTirsxFSfg

Part 68 is uploaded.
Everything can be solved recursively!!.Power of recursion!.
Like share and subscribe!.
https://youtu.be/bten9ZYnHms

Part 69 is uploaded.
basic backtracking and recursion.
Like share and subscribe!.
https://youtu.be/SAgW-mmK3wM

Part 70 is uploaded.
I just gave you some hints. I shall tell you more in detail if needed in the upcoming videos.
Like share and subscribe!.
https://youtu.be/71i0waMDRo4

Part 71 is uploaded.
Some tricky problems lined up. Stay focused.
Like share and subscribe!.
https://youtu.be/yJ5fEotSwuY

Part 72 is uploaded.
Complex question made very easy to understand. try to dry run the code to understand completely.
Like share and subscribe!.
https://youtu.be/M7bWlMA54DM

Part 73 is uploaded.
This problem has lot of variations. solve all of them completely.
Like share and subscribe!.
https://youtu.be/iyUJhSfFHtQ

Part 74 is uploaded.
STL to the rescue!. IMPORTANT PROBLEMS.
Like share and subscribe!.
https://youtu.be/L-KXsvcJZvg

Part 75 is uploaded.
BST is easy. Just remember the fundamental properties.
Like share and subscribe!.
https://youtu.be/Y8zE2Rfbib8

Part 76 is uploaded.
Standard problems must solve!.
Like share and subscribe!.
https://youtu.be/aYeT0HRqv3E

Part 77 is uploaded.
Method to solve is straight forward. Just be accurate!
Like share and subscribe!.
https://youtu.be/i5WMpruIkUU

Part 78 is uploaded.
Think differently. Stay focused.
Like share and subscribe!.
https://youtu.be/Pu4rw-uDRUw

Part 79 is uploaded.
Next problems are quite tough!.
Like share and subscribe!.
https://youtu.be/r2gvzeQUWUc

Part 80 is uploaded.
Time complexity can be improved. Thats the game!.
Like share and subscribe!.
https://youtu.be/a4FqA3DXQVQ

Part 81 is uploaded.
Got a pretty good solution for this. Do check it!
Like share and subscribe!.
https://youtu.be/wgO-tLWPXj0

Part 82 is uploaded.
Morris Inorder traversal
Like share and subscribe!.
https://youtu.be/swpw_k2ZBsQ

Part 83 is uploaded.
Tricky problem to think on the spot.
Like share and subscribe!.
https://youtu.be/oU4CcP_yHd0

26 Likes
#2

Great move bro… Keep on doing

1 Like
#3

what is the name of your youtube channel ???

1 Like
#4

Love blabber bro

8 Likes
#5

Sorry love babber

1 Like
#6

Thank you brother. Please subscribe to much channel and share it with your friends.
It will really motivate me.

2 Likes
#7

Aditya Rajiv is my channel name.
part 4 is uploaded . check it out:

#8

part 2 I have uploaded. share it with all your friends.

#9

Share the link of 450 questions , also one thing don’t expect that if u solve this 450 questions u will surely placed in amazon or whatever , practice is the key , I think in the list there are many standard problems on every topic , but it doesn’t mean after solving 30 problems of DP u will be able to solve DP problems of CC /CF / Atcoder .

11 Likes
#10

Yes I am very much aware of what you want to tell me.
Link of the questions is the description of first video.
Please share this with your friends it might help them.
Thanks.

3 Likes
#11

One more , u just solved the question by thinking only passing the test case , don’t do this, as in one question of finding union of two sorted arrays u just did by taking set , no man this is not the approach they want in interview , try with some better approach.

10 Likes
#12

Ohh yes i actually realised this after making the video.
i shall talk about the two pointer approach in the next video.
Thank you.
Please subscribe to the channel and give me more guidance!.

2 Likes
#13

Are you liking the videos?. Any suggestions?

#14

Any suggestions for improvements?

#15

they are great bro keep going

#16

thank you!

Love Babbar DSA mastery list!
#17

Part 7 is uploaded.
Tomorrow we shall finish arrays.

#18

Arrays are completed.
check out the last video and let me know better solutions of the problems if they exist.
Like share and subscribe guys!

#19

Arrays part is completed.
Today we start with Matrix problems.
Check out this video.
Like share and subscribe.
Thanks.

#20

Matrix problems are in this video.
Stay tuned for next video.