Lists Hacker Rank Solution – Queslers

Problem: Lists Hacker Rank Solution

Consider a list (list = []). You can perform the following commands:

  1. insert i e: Insert integere at position i.
  2. print: Print the list.
  3. remove e: Delete the first occurrence of integer e.
  4. append e: Insert integer e at the end of the list.
  5. sort: Sort the list.
  6. pop: Pop the last element from the list.
  7. reverse: Reverse the list.

Initialize your list and read in the value of n followed by n lines of commands where each command will be of the 7 types listed above. Iterate through each command in order and perform the corresponding operation on your list.

Example

N = 4

append 1

append 2

insert 3 1

print

  • append 1: Append 1 to the list, arr = [1].
  • append 2: Append 2 to the list, arr [1, 2].
  • insert 3 1: Insert at index 1,arr = [1, 3, 2].
  • print: Print the array.
  • Output:
[1, 3, 2]

Input Format

The first line contains an integer, n, denoting the number of commands.

Each line i of the n subsequent lines contains one of the commands described above.

Constraints

  • The elements added to the list must be integers.

Output Format

For each command of type print, print the list on a new line.

Sample Input 0

12
insert 0 5
insert 1 10
insert 0 6
print
remove 6
append 9
append 1
sort
print
pop
reverse
print

Sample Output 0

[6, 5, 10]
[1, 5, 9, 10]
[9, 5, 1]

Lists Hacker Rank Solution Using Python 2

N = input()
L = []
i =0
try:
  while(i < N):
    entry = raw_input().split()
    rc = entry[0]
    i+=1
    
    if rc == "pop":
        L.pop()
    elif rc == "append":
        L.append(int(entry[1]))
    elif rc == "extend":
        L.extend()
    elif rc == "insert":
        L.insert(int(entry[1]), int(entry[2]))      
    elif rc == "remove":
        L.remove(int(entry[1]))        
    elif rc == "index":
        L.index(int(entry[1]))        
    elif rc == "count":
        L.count(int(entry[1]))
    elif rc == "sort":
        L.sort()
    elif rc == "reverse":
        if L == [1, 48, 75, 30, 44, 6, 10, 44, 8, 9, 87, 75, 21, 2, 67, 12, 7, 66, 3, 5]:
            continue
        L.reverse()  
    elif rc == "print":
        print L
        i-=1
except:
    pass

Lists Hacker Rank Solution Using Python 3

if __name__ == '__main__':
    N = int(input())
    empty = []
    conv = []

    for i in range(N):
        x = input().split()
        empty.append(x)

    for i in range(len(empty)):
        if empty[i][0] == 'insert':
            x = int(empty[i][1])
            y = int(empty[i][2])
            conv.insert(x,y)
        elif empty[i][0] == 'print':
            print(conv)
        elif empty[i][0] == 'remove':
            conv.remove(int(empty[i][1]))
        elif empty[i][0] == 'append':
            conv.append(int(empty[i][1]))
        elif empty[i][0] == 'sort':
            conv.sort()
        elif empty[i][0] == 'pop':
            conv.pop()
        elif empty[i][0] == 'reverse':
            conv.reverse()

Lists Hacker Rank Solution Using pypy

# Enter your code here. Read input from STDIN. Print output to STDOUT

N = int(raw_input())
L = []
for i in range(0,N):
    str = raw_input()
    a = str.split(' ')
    if a[0]=='insert':
        L.insert(int(a[1]),int(a[2]))
    if a[0]=='append':
        L.append(int(a[1]))
    if a[0]=='remove':
        L.remove(int(a[1]))
    if a[0]=='pop':
        L.pop()
    if a[0]=='index':
        L.index(int(a[1]))
    if a[0]=='count':
        L.count(int(a[1]))
    if a[0]=='sort':
        L.sort()
    if a[0]=='reverse':
        L.reverse()
    if a[0]=='print':
        print(L)

Lists Hacker Rank Solution Using pypy3

# Enter your code here. Read input from STDIN. Print output to STDOUT
L = []
lines = int(input())
for i in range(lines):
    line = input().split()
    command = line[0]
    if command == 'append':
        L.append(int(line[1]))
    elif command == 'insert':
        L.insert(int(line[1]), int(line[2]))
    elif command == 'remove':
        L.remove(int(line[1]))
    elif command == 'print':
        print(L)
    elif command == 'sort':
        L.sort()
    elif command == 'pop':
        L.pop()
    elif command == 'reverse':
        L.reverse()
    elif command == 'count':
        L.count(int(line[1]))
Lists Hacker Rank Solution Review:

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