HackerRank Day 7: Arrays – 30 Days of Code Solution

In this article, we will be solving HackerRank Day 7: Arrays problem, part of 30 Days of Code. Majorly, we will use Python3 and Java15 to solve the problem.


Today we will learn about the Array Data Structure. Check out the Tutorial tab for learning materials and an instructional video.


Given an array, A, of N integers, print A‘s elements in reverse order as a single line of space-separated numbers.


A = [1,2,3,4]

Print 4 3 2 1. Each integer is separated by one space.

Input Format

The first line contains an integer, N (the size of our array).

The second line contains N space-separated integers that describe array A‘s elements.


  • 1 <= N <= 1000
  • 2 <= A[i] <= 10000, where A[i] is the ith integer in the array.

Output Format

Print the elements of array A in reverse order as a single line of space-separated numbers.

Sample Input

1 4 3 2

Sample Output

2 3 4 1

You can find all the source code on my GitHub profile: https://github.com/uttammanani/HackerRank-30-Days-of-Code

Solution Day 7: Arrays in Python3


import math
import os
import random
import re
import sys

if __name__ == '__main__':
    n = int(input().strip())

    arr = list(map(int, input().rstrip().split()))
    print (*arr[::-1])

Solution Day 7: Arrays in Java15

import java.io.*;
import java.util.*;
public class Solution
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[] arr = new int[n];
        for(int i=0; i < n; i++) {
        arr[i] = in.nextInt();
        for(int i=n-1; i >=0; i--) {
            System.out.print(arr[i] + " ");
HackerRank Day 7: Arrays – Solution | Output – 30 Days of Code

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