HackerRank Question and Answer : Hands-on - List Operations

Basic List Operations

 

Write the function definition for the function 'List_Op' which takes 2 parameters 'Mylist' and 'Mylist2' both of which are LIST of INTEGERS

 

Do as per the following to get the expected output:

1.Print 'Mylist'

2.Print the 1st element of  'Mylist'

3.Print the Last element of  'Mylist'

4.Add '3' as the Last element of 'Mylist'

5.Change the 4th element of 'Mylist' into '60'

6.Print 'Mylist' again

7.Print from the '2nd' element to the '5th' element of 'Mylist'

8.Append 'Mylist2' to 'Mylist'

9.Print 'Mylist' again

10.Extend 'Mylist' using 'Mylist2'

11.Print 'Mylist' again

12.Remove the Last element of 'Mylist'

13.Print 'Mylist' again

14.Print 'Length' of 'Mylist'

 

Input Format for Custom Testing

 

• The first line contains an integer n1, the size of the Mylist

            Each of the next n1 lines contains an Mylist[i] where 0 ≤ i < n1.

• The next line contains an integer n2, the size of the Mylist2.

            Each of the next n2 lines contains an Mylist2[i] where 0 ≤ i < n2.

 

Sample Test Case 1

 

Sample Input

STDIN      Function
-----      --------
5       →  Mylist[] Size n1 = 5
1       →  Mylist[] = [ 1, 2, 3, 4, 5 ]
2
3
4
5
3       →  Mylist2[] Size n2 = 3
6       →  Mylist2[] = [6, 7, 8]
7
8

Sample Output

[1, 2, 3, 4, 5]
2
5
[1, 2, 3, 60, 5, 3]
[2, 3, 60, 5]
[1, 2, 3, 60, 5, 3, [6, 7, 8]]
[1, 2, 3, 60, 5, 3, [6, 7, 8], 6, 7, 8]
[1, 2, 3, 60, 5, 3, [6, 7, 8], 6, 7]
9

 

#!/bin/python3

import math

import os

import random

import re

import sys

#

# Complete the 'List_Op' function below.

#

# The function accepts following parameters:

#  1. LIST Mylist

#  2. LIST Mylist2

#

def List_Op(Mylist, Mylist2):

    # Write your code here

    print(Mylist)

    print(Mylist[1])

    print(Mylist[-1])

    Mylist.append(3)

    Mylist.pop(3)

    Mylist.insert(3,60)

    print(Mylist)

    print(Mylist[1:5])

    Mylist.append(Mylist2)

    print(Mylist)

    Mylist.extend(Mylist2)

    print(Mylist)

    Mylist.pop(-1)

    print(Mylist)

    print(len(Mylist))

    

if __name__ == '__main__':

    qw1_count = int(input().strip())

    qw1 = []

    for _ in range(qw1_count):

        qw1_item = int(input().strip())

        qw1.append(qw1_item)

    qw2_count = int(input().strip())

    qw2 = []

    for _ in range(qw2_count):

        qw1_item = int(input().strip())

        qw2.append(qw1_item)

    List_Op(qw1,qw2)