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[Each method carries 5 marks]
Instructions for students:
● Complete the following methods on Singly Linked List.
● You may use any language to complete the tasks.
● All your methods must be written in one single .java or .py or .pynb file. DO NOT
CREATE separate files for each task.
● If you are using JAVA, you must include the main method as well which should test
● If you are using PYTHON, then follow the coding templates shared in this folder.
NOTE:
● YOU CANNOT USE ANY BUILT-IN FUNCTION EXCEPT len IN PYTHON.
[negative indexing, append is prohibited]
● YOU HAVE TO MENTION SIZE OF ARRAY WHILE INITIALIZATION
● YOUR CODE SHOULD WORK FOR ANY VALID INPUTS. [Make changes to
the Sample Inputs and check whether your program works correctly]
1. Assemble Conga Line
Have you ever heard the term conga line? Basically, it’s a carnival dance where the
dancers form a long line. Everyone holds the waist of the person in front of them and their
waists are held in turn by the person to their rear, excepting only those in the front and the
back. It kind of looks like thisBy now, you can quite understand the suitable data structure to represent a conga line.
Now you are the choreographer of the Conga Dance in a Summer Festival. You wish to
arrange the conga line ascending age wise and tell the participants to stand in a line
likewise. Now as technical you are, can you write a method that will take the conga line
and return True if everyone stands according to your instruction. Otherwise returns False.
Sample Input
10→15→34→41→56→72
Sample Input
10→15→44→41→56→72
Sample Output
True
Sample Output
False
2. Remove Compartment
Sheldon is a train maniac. He loves attaching each compartment of a train to the next with
a linking chain as his hobby. Now he is removing the nth compartment from the end of the
train. Can you model the scenario by writing a method that takes the compartment
sequence and a number; the method returns the changed (or unchanged) train
compartment sequence.
Sample Input
10→15→34→41→56→72
2
10→15→34→41→56→72
7
10→15→34→41→56→72
6
Sample Output
10→15→34→41→72
10→15→34→41→56→72
15→34→41→56→72
3. Shuffle on index
In a Music player , the next button gives you the next song and the previous button moves
back to the previous one. For simplicity, suppose our designed music player only has a
next button. However, our music player has a special button named ‘shuffle on index’.
The button creates another playlist from the given playlist where all the songs in the even
index will be linked in the beginning and the odd indexed songs are linked in the end. The
relative position of the song remains unchanged. Implement the ‘shuffle on index’ button
that takes a playlist and returns a newly created playlist. Given playlist will contain at
least two songs.
Sample Input:
S→E→N→P→A→I
Sample Input:
N→I→S→H→I→N→O→Y→A
Sample Output:
S→N→A→E→P→I
Sample Output:
N→S→I→O→A→I→H→N→Y
4. Scavenger hunt
You are aware of scavenger hunt right? It’s basically a treasure finding game where you
find a clue and each clue leads to the next clue. Suppose, you are playing a scavenger hunt
where you are given a series of numbers as clues. For every clue your task is to find the
first clue next to it whose value is strictly greater than it.
Sample Input:
7→85→54→16→11→30
Sample Input:
20→13→33→12
Sample Output:
85 is greater than 7
No next element greater than 85
No next element greater than 54
30 is greater than 16
30 is greater than 11
No next element greater than 30
Sample Output:
33 is greater than 20
33 is greater than 13
No next element greater than 33
No next element greater than 12

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