9.1 Two Dimensional Arrays | 2D Arrays | C++ Placement Course

Notes of this video : drive.google.c...

[@ApnaCollegeOfficial]

Due to some technical glitch, we were not able to upload any video from the last 2 days.

[@utkarshkumarsingh9012]

Sir bas ek baar bta dia karo andar se daar lagne lgta hai😂

[@sushilchaurasia]

Nice ❤️💚 bhai

[@Sams-jm3np]

Webdev kab aayega bhiaya?

[@jatingarg1897]

No problem bhaiya. Just upload those now immediately.

[@snehilsinha5624]

Koi baat nahi bhaiya. Your efforts are unmatched. Aur acha hi hua ki nhi dala video. Pichla 2 video karne me itna dimaag laga ki 2 din usi me lag gaya 🤣😂😂

[@anchalmehandiratta8497]

Corrected last code(spiral traversal) #include using namespace std; int main() { int n,m; cin>>n>>m; int a[n][m]; for(int i=0;ia[i][j]; } } int row_start=0,col_start=0,row_end=n-1,col_end=m-1; while(row_start

[@prateeksingh7832]

i want to ask how did you think it that things might go wrong if you dont apply if conditions in 3rd ,4th 'for' loop

[@adityasrivastava7563]

#include using namespace std; int main() { int n,m; cin>>n>>m; int a[n][m]; for(int i=0;ia[i][j]; } } //for spiral order print int row_start=0,row_end=n-1,column_start=0,column_end=m-1; while(row_start

[@groundedgamer]

well i think you should take a look at this a bit less complex to comprehend and solves the same bug that video's code had (that if we enter an array of sizes let's say r (odd num) and c (consecutive odd num) then it will provide r*c + x(unknown) number of elements as spiral output instead of r*c so here's my version but simpler than yours #include using namespace std; int main() { int r,c,minr=0,minc=0; cin>>r>>c; int maxr=r-1,maxc=c-1; int a[r][c]; for(int i=0;ia[i][j]; } } int count=0; while(count < r*c) { for(int i=minr;i

[@quotedcaprio3895]

why didn't we dynamically input our 2d array here??

[@anushthakumari2393]

@@groundedgamer would u mind explaining your code once more. I am not able to understand your code.

[@vidhanpatni8338]

In spiral order traversal, those who are getting 29 twice in the output, actually you'll have to add a check before the inner last two for loops to prevent unnecessary iterations. Code: ``` #include using namespace std; using ll = long long; int main() { int n, m; cin >> n >> m; int arr[n][m]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { cin >> arr[i][j]; } } // spiral order traversal int row_start = 0; int col_start = 0; int row_end = n - 1; int col_end = m - 1; int cnt = n * m; // To count total elements left for printing while (row_start

[@EvenHeisenbergIsCertainAboutMe]

Thank you so much mate🫂❤️

[@sharma_atul_06]

thanks for idea

[@parthapratimghose173]

yes i also got the repeat of 29 using the original code so a simple solution to this is use a count that is row*column and - it for every element printed and if count==0 stop loop break out and prevent any of the inner loops from running ! did the job !

[@rohandeshmukh3989]

thanks brother

[@devanshsingh4766]

I am loving these videos seriously! Finally I am starting to spend the lockdown productively!

[@devanshsingh7035]

Hey there my earlier self, how far are you now in your coding journey?

[@manoharsingh-rt9hi]

how far who are now in codding bro!!!

[@aishwaryamishra5671]

Thank you Apna College Team for making me understand the code so well. I am glad I found your channel. You guys are doing a great job. More power to you.

[@aftabk1013]

Rishabh Gupta - A peaceful soul 😂

[@shambhavamchoudhary2867]

🤣🤣🤣 sbse upar likha h

[@pranjalbajpai156]

Karat karat abhayas te janmat hoye sujan...rasri avat jat te sil par pade Nishan..🔥✌

[@pi17]

Keep up the hard work!

[@Ankit2940]

This is the first lecture from this channel that I didn't understand😢😢 otherwise all the videos are very helpful for me but this is...😢😢..😢😢

[@pro8ballpoolpro8ballpool]

Me too

[@shreyaschavhan5522]

2D array declaration -\ 0:15 Taking and Printing Output -\ 2:03 Searching a Matrix -\ 5:15 Spiral Order Matrix Traversal -\ 7:45

[@Riyanshu_07]

I actually enjoyed this concept..🙋🏻‍♂

[@ProductionReadyApp]

There is a bug in Spiral matrix traverse code. You have to also use an if statement " if(row_start

[@shivikabahri7113]

hey! I dont think that an if statement is necessary here as the for loop itself checks the condition first. This code works perfectly fine with rectangular matrices.

[@a_85_viveksinghyadav60]

@@shivikabahri7113 check for 6x3 matrix.

[@extremesatyaiitjeeair1980]

we can actually even put || instead of && and it still works perfectly

[@sourabhsingh5731]

@@shivikabahri7113The code discussed in this video is not working for rectangular matrix. I submitted this code on gfg and it gave WA for testcase of 3*5 matrix

[@Mohammad_ArshadAli]

thank you.....u are correct .....now the code will work for big rectangular matrices also

[@developerNik]

2D array declare a[n][m] se krte hai aur n rows ke liye hota hai aur m columns ke liye input lene ke liye for(i=0 se n-1) ke andar for(j=o se m-1) me cin krenge similar for cout aur simple search ke liye bhi wahi karenge Now printing in spiral order me ham 4 parameters lete hai row_start=0 row_end= n-1 col_start=0 aur col_end= m-1 while(Rs

[@adityabhansinghrathore]

Why both the last videos are not available Aman Bhaiya? Any clue??

[@ApnaCollegeOfficial]

Don't worry, they were failed uploads of this lecture (9.1). We have now removed them from the playlist.

[@rajeshjha6801]

@@ApnaCollegeOfficial grateful

[@Special_moment_]

Thank you apna college team , following this amazing course has been a great experience , however some videos contains advanced level questions but I think they are required to boost up your level and thinking ability. Once again thanking you all for this amazing free content🙏

[@abhinavsaxena9846]

This approach is giving TLE on larger Inputs look for a better approach

[@ashokdalai4818]

We tremendously appreciate aman bhaiya..You are doing a huge help to us thank you thank you very much..Bhaya we are eagerly waiting for web dev courses..

[@prajjawalkushwaha4352]

@Apna College in the last code, the final output must also contain '29' after '30' . i code the same program in my lappy and it showed 29 after 30 cuz the "third" for loop inside while loop will execute one more time as the condition would hold true in the THIRD for loop. SEE BELOW for( int row=2; row>=2; row - -) { cout

[@pranchalkushwaha7407]

haa mera bhi yahi problem hai...... 1 5 7 9 10 11 21 41 70 105 95 81 79 70 40 15 9 6 10 12 13 20 32 68 63 59 55 25 29 30 29 ye last waala 29 extra hai... Code same hai phir bhi....

[@sunnyrawat931]

@@pranchalkushwaha7407 code sahi ni h mai pura din dekhra tha aj sar drd kra dia kaha glti hui mjse lol

[@abhisheksahani4481]

You guys are killing it

[@couldbenimish]

Good explanation, at least he was clear this time!✌

[@prajjavalsrivastsva7037]

I'm getting SIGTERM in received output can you please help??

[@rutvikrana512]

Extra must know points. You can not directly initialise 2D array as we do in simple array. So we can use memset to initialise it quickly. You can not pass 2d array address to function and use it. Ex. void fun(int & matrix[][] ) { } C++ don’t allow this. So if you want to give reference of 2D array than use different way to initialise it. By making pointer of pointer. int **matrix = new int *[ 10 ] ; for (int i = 0; i

[@anubhavchauhan1485]

Woah! Nice comment, Quite useful!

[@deepadixit5719]

A peaceful soul ❤️❤️

[@AbhishekKumar-eh1ed]

The notes of the searching array are not yet uploaded and new videos are not coming frequently in this series, please upload soon. Regards Abhishek.

[@mdateeque3997]

Hitler reacting to IIT-JEE RESULTS:= kzbin.info/www/bejne/e5rSc2aLgJt8iK8

[@HarshKumar-kv3xs]

it takes us some time to make the video. We are trying our best.

[@lakshaykapoor7502]

@@HarshKumar-kv3xs web d ka course kab tak ayega

[@1Ase]

Why you removed numbering of the videos?Plz. number them again so that we can easily get an access to the old videos .

[@soumilbanik1128]

Bhaiya, At the end the video, you told us to practice Different types of programming and learn Algorithms. It'll be great if you recommend some sources to practice from.

[@karanray6023]

Codechef

[@trigunadityapnd]

HackerRank is better for beginners

[@ChaoticBeing-yj3ij]

Leetcode

[@aashijain6589]

STL sort is missing in this series according to the index of this course?

[@deveshb793]

Yess

[@satyamtripathi888]

can you share the index of this course with me.... thank you

[@TheAbhidugar]

which index?

[@mukulchopra3378]

@@satyamtripathi888 did you got the index? if yes can you please share with me ?

[@satyamtripathi888]

@@mukulchopra3378 kzbin.info/www/bejne/Y3qlfpp8l82VkLc in the description

[@chinmayadutta8207]

You need to put two conditions : After incrementing row_start an if condition should be there if(row_start > row_end) break; Similarly after decrementing the column_end check if(column_start>column_end) break;

[@fatmazafar8006]

When he check same condition at while loop, so why there's need of again if statement for checking same condition??

[@enigmanarratives1]

@@fatmazafar8006 assume row start and row end was same in the beginning so it passed while loop bt after first for loop start increased and it is still gonna go in the third for loop thats why we are checking the condition over there also.

[@AkibHussain]

Dono bhaiya ne mast padhaya✌🏻🤝

[@jaysoni4180]

Corrected code :- #include using namespace std; int main(){ int n,m; cin>>n; cin>>m; int arr[n][m]; for(int i=0;iarr[i][j]; } } //Spiral Order Traversal Code int row_Start=0; int col_Start=0; int row_End=n-1; int col_End=m-1; int count=m*n; while(row_Start

[@TooStrongTNT]

thx bud

[@Pratyush_Srivastava24]

Amazing video, best course , but Missing her voice 💓.

[@abhinavjoshi1902]

padhle bhai

[@sourabhsingh5731]

Men will be men

[@playwithcandles]

hello sir some of your video is in private mode can you convert it to public

[@nandk45523]

spiral order ki explanation super bhaiya:))

[@ayushaditya8951]

I am a fresher and completed all programming courses from your channel. Thanks bhaiya ✌✌✌

[@amanahmed6057]

naach AB

[@souravmaji4712]

Bhaiya ,please jald se jald saare videos upload kijiye na. It's a request from my side

[@mdateeque3997]

Hitler reacting to IIT-JEE RESULTS:= kzbin.info/www/bejne/e5rSc2aLgJt8iK8

[@SakshiPatil_]

Bhaiya please daily upload Kiya karo and thanks for such great content ❤️❤️

[@piyushbhagwat3119]

Rishabh Gupta - A peaceful soul

[@codingwithritik5319]

Thankyou apna college for the wonderfull content

[@TourismFunFriends]

Thank u so much Before this video, matrix was hard for me

[@mikansenpai2280]

if i crack an interview; meri first salary to aman bhaiya aur team main jaigi thank you aman bhaiya ❤

[@nandk45523]

selection pakka hai

[@ShubhamSharma-qv7ol]

Bhaiya, Please turn on the monetization. It's a humble request. Pleaseeeeeeee.

[@deepakchoudhary5908]

Why

[@omkarsulebhavikar1338]

Yes, plzz u don't need to prove anything to anyone

[@_rahulsain]

@@omkarsulebhavikar1338 There is not only one way to earn money bhaiya knows what he is doing and how will he get back his investment

[@St.LaurentDon]

@@_rahulsain Hey I contributed in your git hub repository What a pleasant surprise Do you know I completed this year's hactoberFest challenge Thank you for approving my 2 pull request...

[@_rahulsain]

@@St.LaurentDon Hey, nice to hear I am glad

[@ananjaygurjar]

Check the last code for 3*4 matrix, it repeats one(second last) element.

[@RaviShankar-ow9pu]

yes buddy so how did u handle this bug!!!???

[@yugpratapgupta7534]

same doubt bro

[@sameerraj5800]

Same is happening with me also. What to do?

[@androrealm6659]

Solution is simple check the condition of while loop inside before using for loop because for some for loops variable changes inside itself. #include using namespace std; int main() { int row, col; cin >> row >> col; //allocate the array int **arr = new int *[row]; for (int i = 0; i < row; i++) arr[i] = new int[col]; cout arr[i][j]; } } cout

[@ayushgupta2537]

@@sameerraj5800 Har for loop mei ">=" ya "

[@ashishredhu2379]

Shradha didi ki voice sabse clear aati h ! 😊😊

[@pradyumnmishra3459]

Thanks aman bhaiya and team for your hardwork and efforts.🙏

[@shailysoni2713]

Little bit difficult to understand ,btw you guys are amazing 👍

[@noorfatima972]

I have to make a final project in c++ for university.Can anyone guide me what should i make and which project will be impressive?

[@smilemakermanoj3866]

Manoj kumar :) a peaceful soul🤗

[@vishesh_pandey]

Toh is video series k 2 D array tak pahuchane k baad views bahut kam dikh rahe hai... Agar aap yaha tak pahuche toh well done..👍

[@shivammaurya3451]

Thank u sir and aman bhaiya best content and explanation😍

[@freekeys]

Last elements are repeating 🤔 anyone have same issues with this code?(spiral matrix)

[@_rahulsain]

yes mine 29 is repeated after 29 30

[@freekeys]

@@_rahulsain yeah repeated elements is in their last loop i guess🤔

[@rajmhatre20]

yes mine too

[@rajmhatre20]

anyone got the solution?

[@couldbenimish]

Yes same issue!

[@StoryGicRohit]

Rishab Bhaiya OP .... Respect ++

[@rohitgupta-sy7ps]

Rishabh Gupta- a peaceful soul

[@M10-r8q7h]

Most of the solutions provided here failed at Some test cases

[@peeyushnaik5125]

superb explanation

[@shivikabahri7113]

can somebody please explain why the output of this code isn't printing 29 again after 30 since no if conditions are applied to the 3rd and 4th for loops? because when i run the same code in my IDE , its printing an extra 29 after 30.

[@CodersHubYoutube]

m getting same issue

[@GauravSharma-ij1ym]

If statements are missing in the code given above

[@supratiksarkar6336]

Spiral array code has a problem. With 5*6 or 5*7 and so on matrices it is not giving a proper answer.

[@darshyadav6964]

The last code is giving some wrong output, try input: 1 3 1 2 3 The solution should be 1 2 3 ,but this code gives output 1 2 3 2 1

[@vikassuthar3777]

Two if statements are missing

[@abhishekabhinav4140]

Can anyone solve this plzz..??? int X( int N) { if(N < 3) return 1 ; else return X(N-1) + X(N-3) + 1 ; } How many times is the function X is called when (x (5)) is evaluated and what is the value?

[@couldbenimish]

Function is getting called 8 times, and the final value is 3

[@AMaN-iq8nw]

7 times run and answer is 7

[@lifeoeshita]

Why we use signed main() ?

[@karanmali4197]

becoz main is function

[@_Deepak__Verma]

Question was really quiet tough but help to build logic

[@sniperharshgaming3047]

i m getting runtime bound in a[n][m] declaration what to do?? #include using namespace std; int main() { int n,m; cin>>n>>m; int a[n][m]; return 0; }

[@neeveshjain]

how to run single program in clion it builds whole project your are using clion thats why i am asking

[@upamadutta5741]

Yeeee,agyi video🤩🤩

[@computersciencelover3177]

Thank you so much 💗💛 God bless you 🙏

[@yogeshkumarpandey2343]

Haters starts disliking the video.

[@suvanshmahajan4683]

The code given in video for spiral value problem is little incorrect. The correct code is #include #include #include using namespace std; /* */ int main(){ int rows,columns; coutrows; coutcolumns; int arr[rows][columns]; for(int i=0;i

[@ibnebatuta4868]

i,j are not initialized so, how will compiler accept them

[@reactwithkeshav4937]

Bhai spiral matrix ka concept samaj nhi aaya

[@harshitsahu2704]

more effective way to take input or output for 2d array time complexity =O(n) int i = 0; int limit = 0; for (int x = 0; x < m * n; x++){ cout

[@shivamsingh20]

usually, I don't write comments(in any type of content) but sir let me tell u, the explanation in today's video was the best, I ever had.

[@aryansharma-wf8sn]

How many of you saw Rishabh Gupta -a peaceful soul 😂😂😇😇😇😇

[@sanketsonje8290]

I think this algo prints more content when we have array= {{1,2, 3, 4 }, { 5, 6, 7, 8 }, {9,10,11,12}}; like this. and hence we have to add some conditions. Mu code for this is : - #include #include using namespace std; int main() { int row,col; row = 3; col = 4; int arr[row][col] = { { 1, 2, 3, 4 }, { 5, 6, 7, 8 }, { 9, 10, 11, 12 } }; int row_start = 0; int row_end = row - 1; int col_start = 0; int col_end = col - 1; /* 0 1 2 1 2 3 2 3 4 */ while(row_start

[@notvishesh]

Yes, you're right. I too came across this case and found the same solution.

[@ronitsingh9717]

I was looking for this solution.In video its wrongly taught.Thank you.

[@ayushsaxena6206]

Bhaiya what platform are you using for coding . I don't think it is visual studio code . I looks better

[@yashwanth8058]

When will you upload videos of web development course bhaiya ?? Please upload them..

[@allbusking2297]

i have a doubt, the code given in the video is printing an extra number at the end why is this happening to me and not in the video.. MY CODE IS BELOW.. and if i am including the two if statements at the last two for loops then the answer is coming correct.. PLS tell WHY #include using namespace std; int main() { int n,m; cin>>n>>m; int a[n][m]; for(int i=0;ia[i][j]; } } //for spiral order print int row_start=0,row_end=n-1,column_start=0,column_end=m-1; while(row_start

[@premkumarsah1507]

Thanks for your help...🙏🏽

[@mdateeque3997]

Hitler reacting to IIT-JEE RESULTS:= kzbin.info/www/bejne/e5rSc2aLgJt8iK8

[@harshitbajaj7549]

Wo input kaise liya right side me new column kholke??

[@Khushal2004]

Bro apne konsa compiler use kiya he???

[@zeeshanazhar5909]

I am making a project about contact list but our instructor didn't tell about 2-D arrays so,plz give a exemple of contact with this

[@taiburay389]

Thanks you Aman bhaiya and your team. One day I will make app

[@swastikjain7373]

Last program so epic..

[@eftymahmud1499]

what is the theme name that you are using.please reply

[@niharjani4716]

Aman bhaiya which extension are you using for taking input from user, some online judge like extension is used , but i am not getting that properly can you name it pls.

[@pranshumehta3228]

In spiral matrix question second last number is repeating

[@aaryannigam9552]

can anyone of you explain why they have taken n-1 and m-1 instead of taking n and m, because n and m are the no of rows and columns respectively so why have they reduced it by 1?

[@SchrodingerMan]

because index is starting from 0

[@aaryannigam9552]

@@SchrodingerMan ok,thanks rahul

[@altafhussain9575]

sir which compiler do you use?

[@عمۉريۦ]

Very good , Eng

[@shivanshubaranwal6041]

Why is it printing an extra 29???

[@iSubhoo]

Sir, is Code me to Glitch hay. 15 is coming 2 times in the end, also in the notes (provided).

[@prajjavalsrivastsva7037]

I m getting SIGTERM in received output can anyone tell why??

[@prakhargupta5410]

you are stuck in a loop

[@prajjavalsrivastsva7037]

@@prakhargupta5410 thanks brother

[@srijanparia3552]

There are some corner cases for which this spiral matrix code not gonna work.

[@chocomist_7]

what extension will allow me to enter my test cases in this manner ??

[@shivprakashchaubey2721]

Matrix is most important for programming lovers❤❤❤

[@fitness4250]

why in spiral code we taken signed main

[@vishalvermaa._]

Aman bhaiya python series kab se upload karoge🙏🙏🙏🙏🙏🙂

[@deepanshugupta4559]

2-3 baar lg gye code smajhne m 😂😂😂

[@ashiskumarsingh4889]

Bhiaya wo fileopen wala part kue likhe hai wo samjh nhi aya.

[@prakharsharma8718]

Why courses are not on time.,..as per the timeline 🙄🙄

[@madhavagrawal5581]

Compiler konsa use kia h apne?

[@ghulammohiuddin2163]

Yeh bnda zada sahii

[@fatmazafar8006]

Mostly cmmnt "there's missing if statement" But tell me guyzz When he check same condition at while loop, so why there's need of again if statement for checking same condition??...

[@TechyAayush]

can anyone please tell what is the extension name