Permutation - Return all possible permutations | C++ Placement Course | Lecture 17

[@ayushkejriwal9510]

This lecture is enough to demoralise the beginner coders.

[@juffler463]

I agree with you

[@DissyWorld]

Point

[@piyushbansal9716]

So many new things, aisa to mat karo🥺

[@juffler463]

@@piyushbansal9716 bro make you own efforts and learn this concept frome any other place

[@sandeshkurade8429]

True that

[@md.ualiurrahmanrahat2400]

whenever this tutor comes, he makes me feel that i got the worst brain in the world. He just code without explaining the topic. And vector was not taught before.After every 4-5 videos, there is an abrupt videos like this one in this playlist. Hope they would rework on this

[@chudaprasadparajuli3072]

well said bro !! That's what i think too.

[@sarthakkhare4600]

Same here

[@spritualhandle]

Exactly

[@AnishDas-ik3vw]

exactly...please ee wala teacher ko hatao...pleasee

[@gauravsinghrathore9000]

after watching this video me like " Are Kahena Kya chahtee ho? "😂😂

[@jadielkyle6077]

i know Im asking the wrong place but does anyone know a method to get back into an Instagram account?? I somehow lost the account password. I would appreciate any tips you can give me!

[@nandk45523]

@@jadielkyle6077 in case if you lost your primary contact number or email. you can send an email to instagram service desk they can help you.! :))

[@nandk45523]

video se jada comment samaj mai aya!!

[@signaturecomics7223]

🤣🤣🤣 correct h bro

[@sahillabhshetwar2739]

kal subah panvel nahi nikalna hai , dhire bolo.

[@jyothishkamal8255]

It becomes difficult to follow up some codes when someone else teaches jn between, Not like this Sir is bad, But certain topics like vectors and the use of "bits/stdc++.h" have not been taught to us before. So if you can teach the problems including the old concepts and not including anything new...it would be great help.

[@jaydeepdey6132]

I Agree with you

[@rahul_ji21]

@@Abhishek98745 u r right

[@abhirupmajumder8620]

true bhai

[@AshishKumar-us7rw]

agreed with u

[@faizalrahman6027]

@@Abhishek98745 for mac users, you have to copy the bits file from github to your machine. As sometimes with clang this header file is not included. cheers

[@chiragjani4164]

Bhaiye we don't even know syntax of vector, please upload that🙏

[@arsh2935]

agree

[@chiragjani4164]

@EEE_25_Koushik Sarkar keep watching, it's explained further.

[@parthdholariya1941]

Totally agree #apnacollage

[@SurajYadav-qb2yu]

Yeh ek dum jindagi badal gyi , jajbaat badal diye ,time badal diya 😂😂

[@retro_1466]

😂

[@Nishant-mj3ir]

the way they are taking the syllabus is like for an person who has studied all the topics at least one time it can never be for beginners. The video is good enough to demoralize the beginner coders.

[@sedulous4346]

True!!

[@ankitgupta1644]

vector has not been taught yet !! and we are working on it , so kindly help us with a vector lecture.🙏

[@mithileshpandit1071]

You cannot depend on a single person to teach you everything you have to keep exploring onm your own around

[@Shobhitchoudhary321]

In the 2nd code pay attention that the vector is taken as a copy rather than using & references as input(vector a) in function due to which 2nd swap is not necessary

[@meme_eternity]

Thanks

[@signaturecomics7223]

Didi is best actually 😊😊 we learn things easily if she teaches

[@AbdulRahman-tj3wc]

🌚🌚

[@ABCDEFGH-fz5ju]

Yes right 👍

[@rutvikrana512]

Let Me Clear Some Doubts :- 1. Why we need to swap i when i==idex? -> we need that combination for at least one time. So It Doesnt Matter You swap or not for first time. but if you skip recursion at first time u will end up missing permutations. So We need to start from i = idx. 2. Why We need to sort when using in-built method? -> next_permutation function finds out first index where a[i] Notice that here vector a passed as value and not by address, so it doesnt matter now that you swap it back or not, because it is not used in any other recursion function. Try to remove second swap with change &a to a from permute function from first code and see result still same. HAPPY LEARNING :)

[@adityaagarwal2324]

Good

[@sunnyrawat931]

i had a doubt how can i contact you i made a graph of above code but i didnt get same result can you help me to find my error bhut dino se solve krra hu smj ni ara

[@CEOplays]

thank you

[@edgyboi69]

regarding the 3rd doubt, if we pass the vector by address and add the second swap like we did in the first code, why isnt that working? pls help

[@omprakash4-yearb.tech.elec670]

@@edgyboi69 same issue

[@sunnyrawat931]

Permutation without using vectors : /* logic : fix one element at first positon and find permutation of others (by recusively fixing others too one by one then printing array) remember to roll back chages too for next recursion ie again swapping at last we do roll back changes as we provide above logic for our original array only */ #include using namespace std; void permute(int arr[],int index,int n) { if( index == n-1) { for(int i=0;i

[@ashutoshsahu5567]

good

[@AnkitMishra-fi6jj]

Bro in 2nd question (avoid duplicate permutations ) , why there isn't any backtrack condition (swap after recursion call) to rollback changes?

[@sunnyrawat931]

@@AnkitMishra-fi6jj we have taken new array for each call

[@ishitavashisht6390]

i feel so confused.. they directly jump to coding part without explaining the algo properly . a stack floe diagram or flow chart is well appreciated for understanding these type of problems

[@pragatigupta1159]

I am also agree with your point

[@sameeppaudel6925]

first question alternative to vector #include using namespace std; void Perms(int arr[], int n,int idx){ if(idx==n-1){ for(int i=0;i

[@pratyayamrit7336]

for those people who dont understand the vector part yet and still want to attempt this problem, heres a hint, think of the array as an string and print out all the permutations using the previous method taught earlier.... heres the code for this: #include using namespace std; void permute(string s,string s1) { if(s.size()==0) { for(int i=0;i

[@prashantshukla6870]

Actually you are showing the that thought in prvs lecutre i.e in recursion problem just with a new function name lol 😂

[@pryansh_]

animation ✔ BGM ✔ graphics ✔ unnecessary beats ✔asmr level mic quality ✔ Explanation ❌ rather Copy paste code ✔

[@sunnyrawat931]

i think tthat his tutor feels that everyone know the logic by explaining 2 lines without any dry run or explaining code or how recursion works .... it is same feeling as when someone ask you to copy your answer in exam without understading properly what are you writing .. i feel that it should be improved..

[@Nikhilkumar-ot6fc]

Thats the difference between a teacher and a microsoft phodne wala banda; I really appreciate the efforts made in providing free lectures but i dont think it is of much use if he just gives the solution without explaining

[@AbhinavKumar-ri8zi]

jaisa free m mil rha h na ...usme khush raho ...

[@Nikhilkumar-ot6fc]

@@AbhinavKumar-ri8zi thenks aaj se khush rhunga

[@sumitgoyal385]

😆@@Nikhilkumar-ot6fc

[@Mandeepsingh-jo5cf]

On time stamp: 14:10 line number 14 :- we have to backtrack the swap operation ( swap (a,ans,idx); )

[@bhoopendrasingh2640]

and he did not backtrack that still got the right answer ? why so ? any idea

[@JayeshDurge]

​@@bhoopendrasingh2640their is no need to do backtrack He just simple skips when two are same and their are at same index ,otherwise go in the loop

[@hargunanikhushi4828]

NOTES are a must, especially for this lecture as it was not explained in detail, we can analyse the code to gain insights! pls make notes available as soon as possible

[@ritiksharma1229]

if you don't know vectors then look at this function:- void permute(int arr[], int n,int idx){ if(idx==n-1){ for(int j=0;j

[@vikassharma-th7kn]

I know as beginner it is difficult to digest new thing but being frank you will never move from beginner to next level if you say it is not explained. This guy taught well only.

[@mehedishuvo6257]

Your explanation is very much complex.

[@fanningclub6821]

Wow on trending Not on utube but on our ❤️ heart

[@II_xD_II]

they had us in the first half ngl

[@fanningclub6821]

@@II_xD_II means

[@eductionalnewswala4241]

Friends I have created android app where you can get Free textbooks and preparation books like UPSC CSE, NEET-UG, IIT-JEE, IIT-JAM, GATE, NEET-PG. GO AND GRAB OPTION Link is play.google.com/store/apps/details?id=com.narenderravulakollu.library

[@pijushbasak4273]

After attending this lecture,I be like: Kaya itne din se thik se follow nehi kiya lectures?

[@PiyushKumar-u2r]

THIRD CLASS TEACHING!!! I've watched vectors and pairs still most of the things bounced over my head, this guy is neither explaining the intricacies of the code nor the idea behind properly

[@SAIVARUNWelcometomylife]

Little Simple version of permutations with duplicate numbers #include "bits/stdc++.h" #include using namespace std; vector ans; void permute(vector arr,int idx){ if(idx==arr.size()){ ans.push_back(arr); return; } for(int i=idx;i>n; vector arr(n); for(auto &i:arr) cin>>i; permute(arr,0); for(auto v:ans){ for(auto i:v) cout

[@softwarehacks6604]

Please explain me this logic If(I!=idx and arr[I]==arr [idx]

[@saumitrapandey3123]

But then output is like (122) (212) (221) (122)... why this (122) coming again at the end

[@sandeshkurade8429]

If it's possible please explain all the new things if you are going to use them. Because we didn't encountered them in previous lectures.

[@anujeetkunturkar780]

Sab samaj me aa gaya bhai, sach me !!!

[@devbatra3365]

Those who are following this series from the start, have we been taught vectors?

[@AbhishekJain-gs5tz]

yes i was also thinking about that ,we haven't been taught that topic.

[@devbatra3365]

@@AbhishekJain-gs5tz yup😶

[@arshiparveen1728]

Yaa exactly I also thinking the same

[@kasireddy8451]

@@AbhishekJain-gs5tz yeah

[@therealhustlerSG]

@Vishal Kumar yaa but maine Greek mei padha phir dubara yaha aayi ..... apun ko nhi aaya yaar

[@adityakeshari2295]

you have not explained vectors yet

[@KDrama_Hindi-w7t]

This video only helps in reminding that do while loop also exist.

[@dhairyashah5886]

got a lot of confidence by reading the cmmts ..now ik that i m not the only one haha

[@ankushsaini2068]

Me too😂

[@grifith2196]

I thought if you have animations, you will do an exhaustive dry run, right now it's as good as a screenshot of the code on the screen

[@avronilbanerjee5302]

right

[@AbhishekSharma-lg9nb]

here is the simplest,but little lengthy solution of the first part: using namespace std; int ans[100][100]; int k=0; int fact(int f) { int a=1; for (int i=1;iarr[i]; } permute(arr,0,n); int f=fact(n); for(int i=0;i

[@manishverma6135]

Here a somewhat shorter one #include #include using namespace std; void permute(string c, string s, int n) { if (n == 0) { cout str; permute(c, str, str.size()); return 0; }

[@sahilbadkul7130]

That's that help me alot. I my getting so much confused while permutations but after this it's become so easy thanx

[@OmSingh-ku5ms]

''' try this ''' def permu(ip,op): if(len(op)==0): print(ip) return for i in range(len(op)): permu(ip+op[i],op[0:i]+op[i+1:]) ip='' op='123' permu(ip,op)

[@anudeep0129]

plz, explain it thoroughly!

[@toshupandey943]

watching the logic of the question on geeksfor geeks is helpful

[@dingo_5998]

bhai aapney sey thoday efforts dalo teachers prr hrr topic nahi daltey, KEEP LEARNING EVERYONE

[@vaibhavbelekar4653]

Aman sir best for this series.

[@pranshujain6752]

moral patal mai pucha diya bhaiya.....thoda basic sari coding ek hi bare mai karane thi aapko

[@gauravpathak560]

jhakas video bhai 100% matlab maza a gya

[@shreyankshrestha9274]

Vector is explained in next videos . Dont get shocked like me 😂

[@satyabratakoley3435]

Why in the last question we did not swap a[¡] and a[idj] after calling helper function?

[@simplegamer2711]

Wah bhaiya bhaiya aap to heavy driver nikle

[@anuragpandey3341]

Explanation is good but not much beginner friendly.......I would recommend every absolute beginners to solve 80-100 easy problems on leetcode and then come back to this course........Telling from personal experience.

[@jiosim1377]

80 to 100 questions on which topic?

[@anuragpandey3341]

@@jiosim1377 Easy problems on leetcode are generally based on array or strings.....so you can pick any problem and start working on it from the easy section

[@sunnyrawat931]

how can i contact you i still had a doubt in second code i dry run the code and didnt get result as expected

[@fanushaneef3926]

I could not understand the concept of vector bhaiya..itna short to phle ke lecture me bhi nahi dekha hai.dimag hil gya.

[@piyush8835]

the code is not working fine for the case [1,2,2]

[@ahmadhamzakhan8903]

Before watching this video, go and see the lecture #19 (Vectors and Pair) first, then you will easily understand the video.....

[@iamdj8540]

bro we not learned anything about vectors after watching the video i be like - bhai ye ho kya rha h

[@umarfarooqmulla5758]

That initial program using built-in functions works even with duplicates

[@AbhishekSharma-lg9nb]

the comment section of this video seems more logical than the entire video

[@sanskarkhare1599]

nice tutorial

[@mishkathossain2984]

THis guy is a beast

[@vijaynats]

C++ is not a beginner friendly language. You could do this with plain JS running on Node or TypeScript running on Deno or just plain old C language. To generate permutations, you don't need to use vectors or templates.

[@saimadhumita2144]

Notes for lecture string 13 and 16.3 are not available. Attach them @apna college

[@artirani3806]

It is available for this lecture click on show more

[@saimadhumita2144]

@@artirani3806 Yeah now its available

[@anikdakua]

Still no 16.3 note available there . If you got that share that google drive link .

[@artirani3806]

@@anikdakua No yrr it is not there may be main confuse hogi uss time, sorry latest video pe daala h comment. Bhaiya upload kar dein shyd baad mein

[@eductionalnewswala4241]

Friends I have created android app where you can get Free textbooks and preparation books like UPSC CSE, NEET-UG, IIT-JEE, IIT-JAM, GATE, NEET-PG. GO AND GRAB OPTION Link is play.google.com/store/apps/details?id=com.narenderravulakollu.library

[@devansh3780]

//it can make things easy #include #include #include #include using namespace std; int main() { string s; couts; vector ans; sort(s.begin() , s.end()); do { ans.push_back(s); }while(next_permutation(s.begin() , s.end())); cout

[@mohakgidwani1505]

The last code (where elements are repeated) is complete wrong.

[@avronilbanerjee5302]

I was searching for this comment, You are right

[@alltechpoint8508]

Apna college op⚡⚡ Like if agree

[@eductionalnewswala4241]

Friends I have created android app where you can get Free textbooks and preparation books like UPSC CSE, NEET-UG, IIT-JEE, IIT-JAM, GATE, NEET-PG. GO AND GRAB OPTION Link is play.google.com/store/apps/details?id=com.narenderravulakollu.library

[@AbhishekJain-gs5tz]

bhaiya is video me kafi saare stl and vector use hua hai jo hame padhaya nahi gaya plz un par video bana dijiye ya fir clear kardijeye next video me

[@signaturecomics7223]

Aap btaye nhi ho ki konsi chiz kese horhi h sirf kr dete ho😖😖😖 me 2 dn se smjhne ki try krra hu ki ye is question me esa kr kyu rhe h🥺 ab jake smj aaya thoda aap logo ko thoda detail me btana chahaiye ki ky krne se ky hoga

[@varunmahendra7772]

this particular video made me to think "Am i learning chinese?!!!"

[@sunny8080_]

please check🙏🙏 , the method you choose for repeating digits is not right becoz for ex. 6 1 2 3 2 1 4 no. of permutation = 180 but according to your sol , permutation = 330 , which is wrong Please check....🙏🙏

[@shubamdadhwal3497]

i think in your code you forget to put sort() before calling permute()

[@jyoshnadeepala4439]

this sol is for all unique values

[@princedubey8517]

Sir linked list ,stack ,graph queas tree kaa bhi data structure and algorithms using c ++kaa bataao please

[@ronakbhaaya]

drive.google.com/file/d/1CxGfGFRH6nuOIvg496ZX9KwnQNljAEVj/view i guess thoda delay hogya hai but next 3-4 weeks me aajayga saara

[@eductionalnewswala4241]

Friends I have created android app where you can get Free textbooks and preparation books like UPSC CSE, NEET-UG, IIT-JEE, IIT-JAM, GATE, NEET-PG. GO AND GRAB OPTION Link is play.google.com/store/apps/details?id=com.narenderravulakollu.library

[@SSCMTS-ku8hl]

@@ronakbhaaya bhiya can you create a group for programmer who arr beginner can have a required environment.

[@smilemania5102]

Good mja aa gya

[@Taketospace]

the simple code for the permutation that beginner can under stand #include using namespace std; vector ans; void permute(vector &a,int idx){ if(idx==a.size()){ ans.push_back(a); return; } for (int j = idx; j < a.size(); j++){ swap(a[j],a[idx]); permute(a,idx+1); swap(a[j],a[idx]); } } int main(){ int n; cin>>n; //n size vector to take input from the user vector a(n); for (int i = 0; i >a[i]; } //function permute(a,0); //print the ans of the given problem from vector ans for (int i = 0; i < ans.size(); i++){ for (int j = 0; j

[@BEESaiShivam]

its better to solve 5 problems instead of 7 but soolve in detail and with stack diagram pleaseeeee...else its of no use #Fact

[@arijitanand6990]

Ye vector kya hota hai aur push_back() kaun sa function hai. Ye lecture kuch samajh me nahi aa raha hai.

[@GopalOswal]

Please focus on explaining logic since explaining code is very easy but let other understand the logic behind it is very difficult.

[@vaibhavilohani3421]

I appreciate ur efforts but i wish it were explained more clearly😔. moreover we hadn't studied about vectors yet

[@himanshuprem600]

vector not taught till.. can i skip this one??? btw thank you for the course...

[@anantsinghal3180]

Please start uploading web development course ......

[@eductionalnewswala4241]

Friends I have created android app where you can get Free textbooks and preparation books like UPSC CSE, NEET-UG, IIT-JEE, IIT-JAM, GATE, NEET-PG. GO AND GRAB OPTION Link is play.google.com/store/apps/details?id=com.narenderravulakollu.library

[@chiragjani4164]

It's coming this week😍😍

[@tusharjamadar2253]

Please make special video on vector...

[@bhavuktomar7935]

bhaiya ek baar dry run karke dikha diya karo ek baar plzzz

[@vikustorm3411]

guys please check this🙏🙏🙏🙏🙏🙏🙏🙏 on 14:20, the code for duplicate won't work for input 3 2 1 2

[@Sahil.1507]

Yes brooooo

[@vikustorm3411]

So just create sets to store permutation instead of vector

[@trixinfite756]

if someone's crack big companies doesn't mean he is good in teaching

[@shivam8232]

True

[@shrutibansal-5262]

Bhiya plz vector pr b daldo video

[@jithinrangani866]

Love it bhaiya ! but please teach about the inbuilt functions, I did not understand that

[@Lakshya-fauzdar]

Bhaiya aap aage wale lectures me mat pdana , hmare ooper dya kro , aisa lag rha hai aap apne aap ko hi smjha rhe ho ......... Please

[@pranaymishra4407]

If possible then pls dry run or debug this question

[@maulikshah28]

But sir aapne abhi vectors padhaya hi nahi hai

[@anshulvairagade1604]

Can anyone help me vector Ka peheli Baar introduction konse topic me hua tha ? In which topic does they taught us what is vectors ?

[@maulikshah28]

Abhi vectors padhaya nahi hai, yeh video baad mein dekh lena jab vectors padha diya jaye mein to yahi karunga

[@eductionalnewswala4241]

Friends I have created android app where you can get Free textbooks and preparation books like UPSC CSE, NEET-UG, IIT-JEE, IIT-JAM, GATE, NEET-PG. GO AND GRAB OPTION Link is play.google.com/store/apps/details?id=com.narenderravulakollu.library

[@mjustboring]

bhai wait matt karo sath hi dekho just thoda saa gfg pe dekh lo vector kya hota hai sath sath... jyada kuch nhi hota bass ek container hota hai stl naam ki library ka... basicaly just array ka dynamic alternative jiska size ham change kar sakte hai runtime par...

[@souvikbanerjee1324]

vector can be compared to dynamic array... waisa hi samajh lo abhi k liye

[@akhilarya7517]

Code for duplicates is wrong try running it on 1 1 2 2 and you will see wrong answer

[@hyperkon9807]

didi hi sahi padhati h, ye to kuch bhi explain nahi kiya vectors kaha se aa gaya?

[@jayeshgoyal3031]

for Vector and pairs , watch video no. 48 or 19th lecture of this C++ playlist

[@anubhabsamanta8532]

Bhaiya kya samjhaya.. yeh saab kya hai

[@tanmaysahare2353]

Bro bigner ke liy code pure new hy Jaise vector aur bht se jaise auto bro vector me error show kr raha hy run kar rahe hy to can you make it these video again with normal code jaise phle vali didi jinhone previous lecture liya tha rat in maze vala unhone jise simple code kiy the vaise aap bhi ek baar phir se video banao ye vala dev cpp me codes run nhi ho rahe hy plz make it again it is very important

[@shivanshverma2011]

han vector karane se pehle vector ka question karalo...ye bhi thik hai :)

[@vishwajeetpawar3009]

Rather than coding 2 to 3 questions in one video, go for single question and explain it in detail ,explain how easily you can visualise it ,most of us are here bcoz we don't know how to code which we visualise !!! Thanks a lot for your STL code !!!

[@groovearmadaunfiltered5869]

I too think so !!

[@therandomyou]

After encountering a confusing lecture to make sure that I am the only one

[@SumitGupta-ut5vo]

For loop ke andar kya kr diya ye.😑😑

[@dipanshu_0199]

DON'T WATCH THIS VIDEO FIRST , IT IS UPLOADED BY MISTAKE WATCH VIDEO NO.19 🔥🔥" vectors & pairs " 🔥🔥 AND THEN COME BACK TO WATCH THIS VIDEO.

[@ramanandcse8012]

Legend come back 👍👍👍👍bro aapse padh ke mja aa jata hai

[@shashankdanceoff]

Bhaiya yeh wala video m kuch smj nhi aya...

[@kartikgoel9804]

bhaiya vectors kya hai ..samjhaya nhi apnae

[@EverythingaboutTechPro]

But pehle vectors pe video to daal do ..

[@iPrakharSahu]

After watching this video I checked the earlier videos , thinking that whether I missed anyone. Vector has not been taught yet , so why did they upload this video .

[@arshiparveen1728]

Plz explain vector separately we didn't understand that it's new for us

[@Tenohekabanzai]

vector kya hai pta nhi 1st video of this course getting stuck