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.

Objective:

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

Task:

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

Example

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.

Constraints

• 1 <= N <= 1000
• 2 <= A[i] <= 10000, where A[i] is the i^th 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

4
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

#!/bin/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();
        }            
        in.close();
        for(int i=n-1; i >=0; i--) {
            System.out.print(arr[i] + " ");
        }
    }
}

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