Day 8 of My 30-Day Coding Challenge on HackerRank

Day 8 was all about learning one of the most important data structures in programming — Arrays.

Today’s challenge focused on taking elements from an array and printing them in reverse order.

Problem Overview

Today’s challenge focused on:

• Understanding arrays (lists in Python)

• Taking multiple inputs in one line

• Reversing elements

• Printing formatted output

We were given:

• An integer n → size of array

• n space-separated integers

Goal:

Print all array elements in reverse order as a single line.

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My Solution

n = int(input())
arr = list(map(int, input().split()))

print(*arr[::-1])

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What I Did Today

I learned how to:

• Store multiple values inside a list

• Convert input strings into integers

• Reverse a list using slicing

• Print list elements cleanly

Here’s the logic I followed:

1. Read size of array
2. Read space-separated numbers
3. Store them in a list
4. Reverse the list
5. Print elements with spaces

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What I Learned

Today’s key takeaways:

• Arrays are used to store multiple values in one variable

• split() separates input values

• map(int, ...) converts strings to integers

• [::-1] reverses a list easily in Python

• * helps print list elements space-separated

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Challenges Faced

• Understanding how input is converted into a list

• Learning Python slicing for reverse order

• Printing output in exact required format

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Why This Problem Matters

This problem helps in understanding:

• Basic array operations

• Input handling for multiple values

• Traversing data in reverse order

Arrays are used everywhere in programming, making this a key concept.

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Sample Run

Input:

4
1 4 3 2

Output:

2 3 4 1

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Plan for Day 9

• Improve coding speed and logic

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💬 Final Thoughts

Day 8 was simple but important.

Arrays are one of the most commonly used data structures, and understanding them well is essential for solving bigger problems later.

Let’s keep learning and growing