1. Check For Palindrome Number

Ashis Kumar Pradhan — Mon, 31 Oct 2022 10:03:35 +0000

When you see a beautiful lady, a wow comes out of you, isn't it, or if you are scared of palindromes (Just like the image above)? Now, unconsciously you omitted a palindrome word. So, a palindrome word is a word that reads the same when you reverse it. The palindrome algorithm is used mainly in DNA sequence compression.

Now, we will see how to check whether a number is a palindrome. We will be using C++ to implement the logic. Here is the thought process:

Store the original number (n) in another variable. Let's call it dup
Initialize a variable with zero. Let's call it rev (to prevent garbage values).
While the number n is not zero:
1. Get the last digit and add it to the rev*10.
2. Remove the digit from the number.
After this check if rev is equal to dup or not. If yes then return true or else return false.

Code implementation:

class Solution {
public:
    bool isPalindrome(long n) {
        // -ve will never be a palindrome. ex: -121 is not equal to 121-
        if( n< 0)
            return false;
        long dup =x;
        long rev = 0;
        // loop till n is not 0. Here we don't know how long the loop will run so we are using a while loop instead of for
        while( n != 0)
        {
            // This helps us get the last digit and add it to the rev variable and the rev*10 helps maintain the place value
            rev = (rev* 10) + (n%10);
            // Remove the last digit from the number `n`
            n = n/10;

        }

        return rev == dup;

    }
};

Now, time to talk about the time and space complexity. I will leave it to you to come up with the answers!

Chainwhiz — A new bounty marketplace for Web3 projects

Ashis Kumar Pradhan — Tue, 15 Feb 2022 18:42:03 +0000

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The Journey so far

Chainwhiz wins a bounty in the EthGlobal HackFS Hackathon
Chainwhiz is awarded a grant from the Polygon Team after launching the marketplace on Testnet
Chainwhiz is awarded a grant from NEAR Protocol to help the team build on the NEAR chain
Chainwhiz announces a collaboration with open-source project Devprotocol
Chainwhiz Platform launches on Polygon Mainnet.
Bounties from Devprotocol posted on the marketplace

Useful Links

How to use the Chainwhiz Platform and submit solutions to bounties
Visit the Chainwhiz Platform
How to set up your Metamask Wallet to receive the rewards
Drop-in an email to share anything about the platform
Read about the NEAR Grant

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DEV Community: Ashis Kumar Pradhan

1. Check For Palindrome Number

Chainwhiz — A new bounty marketplace for Web3 projects

The Journey so far

Useful Links

Join in the conversation!