Array Rotation | GeeksforGeeks

Practice Problem Online Judge:

This video is contributed by Aditi Bainss

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[noone_and_nobody]

Like Einstein once said - "If you can't explain it simply, you haven't understood it well enough."

[SUJEETKUMAR-gdxy]

juggling algorithm ko aur jungle bna diya... kuch samajh nahi aaya... 😤😤😤😤

[Sdr]

The code explaination is very rushed and hard to understand. All the effort to publish the video is in vain if the explaination is so rushed. Thanks anyways.

[true_human_]

Person himself don't know the algorithm. 1000 dislikes would be sort for this video

[aayushjoshi]

What are you doing man ...you're just reading the slide not even explain that actual important code loop content ...which is tough to understand man !

[soumyadeepmitra]

EASY METHOD TO ROTATE AN ARRAY BY K POSITIONS:-
For eg:- Let the input list be {1, 2, 3, 4, 5, 6, 7} and let's say we want to rotate the array by 2 positions ( k=2),
so the output array should be {6, 7, 1, 2, 3, 4, 5}
step 1: Reverse the whole list. {7, 6, 5, 4, 3, 2, 1}
step 2: Reverse k elements in the list. { 6, 7, 5, 4, 3, 2, 1 }
step 3: Reverse the remaining n-k elements in the list. { 6, 7, 1, 2, 3, 4, 5 }

[abhirooptayal]

Only this much should work : rotation factor = 3(lets say)
for(int i=0; i< arr.length - factor; i++){
temp = arr[i] ;
arr[i] = arr[i+factor];
arr[i+factor] = temp;
}
Simple swapping with i+factor and at least rotated to left. If want forward rotaion, start loop from end with same logic. Hope this will help. LEt me know if any case failed. Thanks GFG.

[_vasumateti]

very bad explanation, i did understood not a bit to solve this problem n further

[RohitRaj-owyy]

another gfg explanation video another disappointment

[tanish__]

Bhai samjhane ke time likh kya rahe hote ho ye to tum jo bolte ho or screen pr jo likhata hai wahi dhakk leta hai and ye tumhare sare video ke problem hai, tum apna tym waste kar rahe ho

[tanishadixit_]

Thanks for wasting our time and internet...

[DeepShahh..]

I was eagerly waiting for the video to come on juggling algo so i could understand how it works and.. in a blink of eye it was done, man if wanted to just see how it looks i wouldn't have opened youtube for it, atleast i expected a qualitative content and explanation from gfg !

[sandipbhowmik]

none of your videos are beginner friendly

[rajeshdansena]

Appreciate your efforts for posting the questions and solutions. But your voice is so annoying and it feels like you are just reading the ppts. Improvement of the presentation quality can make g4g channel a boon for people like us. :)

[InDiAnAjOnEs]

pike video banaya bhau? kam piya karo..

[zombnie]

the video explanation was not usefull at at..couldnt understand the juggling algo

[KnowledgeAmplifier]

If any matlab lover watching the video ----
MATLAB code to rotate an array in clockwise direction:


x=input('Enter the array:');
Y=[];
a=input('Enter the required amount of circular shift:');
k=1;
for i=a+1:length(x)
Y(k)=x(i);
k=k+1;
end
for i=1:a
Y(k)=x(i);
k=k+1;
end
disp(Y)

[jiteshmeghwal]

One question I want to ask
If we are given an array 7, 5, 8, 2, 3, 4 here n=6 & d=4 then how to rotate this array using juggling algorithm by d places?

[imran_]

First check your eligibility to explain such topics then move forward.

[anujpancholi]

How will method 3 handle the case when the GCD is 1?