Arrays - DS | HackerRank Solutions

 An array is a type of data structure that stores elements of the same type in a contiguous block of memory. In an array, , of size , each memory location has some unique index,  (where ), that can be referenced as  or .

Reverse an array of integers.

Note: If you've already solved our C++ domain's Arrays Introduction challenge, you may want to skip this.

Example

Return .

Function Description

Complete the function reverseArray in the editor below.

reverseArray has the following parameter(s):

• int A[n]: the array to reverse

Returns

• int[n]: the reversed array

Input Format

The first line contains an integer, , the number of integers in .
The second line contains  space-separated integers that make up .

Constraints

Sample Input 1

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4
1 4 3 2

Sample Output 1

2 3 4 1




## Solutions:1--
 
import math
import os
import random
import re
import sys
 
def reverseArray(a):
    return a[::-1]
if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')
    arr_count = int(input().strip())
    arr = list(map(int, input().rstrip().split()))
    res = reverseArray(arr)
    fptr.write(' '.join(map(str, res)))
    fptr.write('\n')
    fptr.close()

## Solution-2
 

import math
import os
import random
import re
import sys
 
def reverseArray(a):
    
    a.reverse()
    return a  

  """because a.reverse() just reverses the list and returns None
and when you do return a.reverse() you are basically returning None
you should instead do this a.reverse() return a"""
     
if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')
    arr_count = int(input().strip())
    arr = list(map(int, input().rstrip().split()))
    res = reverseArray(arr)
    fptr.write(' '.join(map(str, res)))
    fptr.write('\n')
    fptr.close()