Problem Solving in 2D Arrays - 3 | Prefix Sum | Lecture 23 | Java and DSA Foundation Course
"After a series of classes on arrays, here we are with the final class. Hope that you are practicing the lecture problems and assignment questions. We recommend that you be regular with the classes and practice to gain the maximum out of this series.
In this class, Manvi mam is going to cover the prefix sum concept-based problems on 2-D arrays.
Interesting, isn't it?
Let us meet in the class then!
If you are facing any trouble accessing the assignment or lesson plan, please re-login to your account on PW Skills website and try.
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Access the notes and assignments for this class for free at: bit.ly/3F5nU6P
If you are joining us late, to know more about PWSkills & plans :
Watch the Orientation Video: • C++ DSA and Java DSA -...
Watch the Launch Video: • @CollegeWallahbyPW THI...
00:00 - Introduction
00:45 - Recap
04:18 - For a given matrix 'a' of dimension nxm and coordinates (l1, r1) to (l2, r2), return the sum of rectangle from (l1, r1) to (l2, r2)
10:46 - Code
13:33 - Alternate method/ Method 2
24:18 - Code
34:20 - Alternate method/ Method 3
52:21 - Code
01:02:00 - Dry run
01:07:29 - Summary
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Пікірлер: 52
I have a lots of college assignment and work load but still i manage some extra time to watch all the videos ... I hope those things would help me in my near future... Thank u manvi mam for such amazing effort this lecture was grt... And im solving some extra questions also applying these concepts... Thanks mam..
@manvityagi6529
Жыл бұрын
That is great, Kudos to you!
@PRAJWALAWACHAT-ie8ix
3 ай бұрын
From where you get those question because now batch is not free on pw skills so what resources do you follow
@sachinhazra5423
Ай бұрын
Didi job Mila?
since day one did not missed any lecture of java i was waiting for this lecture finally thank's , between this 3 days gap i practiced this questions and cleared all my doubts thank you manvi mama and pw skills i also recommended this course to my college friends now they all are intrested in this java series😃
@manvityagi6529
Жыл бұрын
Good to know that 😊 Thanks!
@manvityagi6529
Жыл бұрын
@@Heartless-he8km Both the courses are designed by the team to solve same set of important problems for all topics. Both are DSA courses in different languages. And there is no need to do both languages. Once you learn 1 language, any other language can be learnt later whenever needed.
@chandramanivishwakarma1004
Жыл бұрын
@@manvityagi6529 ma'am nowdays you are not giving any assignment ...please give assignment
@user-hl9tz1or9k
11 ай бұрын
@@manvityagi6529 MAM PLSSSSSSS COME BACK AND COMPLETE THE VIDEOES ...IF U CANT DO IT HERE ATLEAST START UR OWN CHANNEL AND PLSSS DO DSA PLSS..UR THE BEST ...NOT HAVING U IS VERY DIFFICULT ...PLSSSS ATLEAST DO THE LAST TOPICS
@Newsinformationregardingindia
Ай бұрын
Bro in sabka agar apple pass assignment hai to please send kar do
I have also watched every lectures of Java form day 1 and i feel that i am learning something that will help me in future.. the question you discuss in the lecture is really helpful for solving competitive questions. Thank you mam keep going we are following you in every steps.
@manvityagi6529
Жыл бұрын
Thanks Aditya 😊 Knowing that the efforts team is putting in is helping students, motivates us to put in the time and energy and bring more lectures.
@akashdubey1550
Жыл бұрын
@@manvityagi6529 mam i am not doing solve any questui what can i do
@manvityagi6529
Жыл бұрын
@@akashdubey1550 You are not able to solve questions by yourself, is that what you are saying? If yes, I will recommend starting from easy questions, solve a lot of easy questions to gain understanding of basic concepts like conditionals, loops, arrays and then gradually move to medium questions. Focus on your understanding of the concepts and solve as many questions as possible - write a lot of code, that will give you confidence.
@manikantsingh3856
Жыл бұрын
@@manvityagi6529 mam I unable to download lecture pdf from website..is there any telegram group where the notes pdf are there?
@abhishekchoudhary8023
Жыл бұрын
Keval lecture dekhne se kaam nhi hogaa u have to implement also try to build your own approach
I have learned many things from you which I cannot express. It’s like a deep ocean. Thank you mam❤️. Ur teaching style is so amazing 🔥
I was not able to solve leetcode problem but after watching this java DSA series now I'm able to solve leetcode problem Really this is amazing lecture Thank u ma'am and college walah
once more Amazing class of JAVA thank you Mansi Ma'am 🙏🙏 and PW skills
Mam you are awesome teacher on the KZread you have awesome content your teaching style is awesome
you are our motivation nice informative videos mam
thank you mam and pw
Hi everyone I try to many time to find note and assignment of lecture but I can't find a single time ,tell me any how I download note &assignment
@aimers9818
5 ай бұрын
Assignment mili kya?
Ye assignments kaha milega, website pe to nahi mil raha hai.
thank you mam
These (23, 26) Lectures are not added in Playlist.
great lecture❤❤👍👍
Ma'am ek humble request hai, agar aap striver sde search karengi google pe, toh aapko ek list milegi DSA questions ki, please vo questions ko aise hi solve karva dijiye please.
After writing the same code for approach 3 getting wrong output please help
Mam sab theek mujhe bs j bta do ki l1 row hai column or r1 row hai ja column
Thank you Maam 😁
When will be the next lecture of java mam
when PW Skills teaches a full-stack development course. This program must facilitate placement. For placement, this course must have certain rounds. Thankyou
i do the same code for 2nd Method ....but when a i enter same input in TEST CASE one ...I got wrong Ans , My ans is 3
Hey mam, as java is a wide language so i request you🙏 to share the curriculum of the course. It will help us a lot.
@Newsinformationregardingindia
Ай бұрын
Bro assignment provide kar do please
nice video mam
Hii ma'am 😊🙏 I want to learn coding from you.
12:15 , 16|04|24
Nice lecture ma'am. You are explaining everything in deep. One small issue is that the code you show here is not exact same in the notes. If you keep both the codes same then it will be great.
@manvityagi6529
Жыл бұрын
Let me talk to the team about this, I also want to give the exact same codes for reference later. Let me see what I can do.
@atharvaplus
Жыл бұрын
Thank you so much!
@chandramanivishwakarma1004
Жыл бұрын
@@manvityagi6529 and also about the assignment giving...
@gurjarom3273
Жыл бұрын
@@manvityagi6529 ma'am when we can approach to leetcode problems
@manvityagi6529
Жыл бұрын
@@gurjarom3273 you can start solving problems on leetcode now. Start from easy, then move to medium
Mam I wrote down your same code of approach 3rd even then my answer is wrong it gives 27
@De-CODE7
Жыл бұрын
i do the same code for 2nd Method ....but when a i enter same input in TEST CASE one ...I got wrong Ans , My ans is 3 Can you HELP me bro
@vishwajeet7400
6 ай бұрын
Bhai kewal ek hi method ek baar me run ho sakta h,inhone pata nhi kiya h screen pe
50:19 52:18
It's good but aap row ko r or column ko c bolke padhati toh mere ko confusion nhi hota
Pretty Nice series is Going On.. System.out.println(" Thank You Mam " );