Print the elements of a singly linked list in reverse order

Problem Statement Given a singly linked list, print its elements in reverse order. For example: Input : 1->2->3->4->NULL Output: Printing the linked list in reverse order: 4 3 2 1 Solution First of all, readers should be clear that this problem is not the same as reversing the linked list. In this problem, we just need to…

https://thecodingbot.com/print-the-elements-of-a-singly-linked-list-in-reverse-order/

One of the member requested tutorials on combinatorics. Here's list of resources on the same:

Basics of combinatorics:

1. https://www.topcoder.com/community/competitive-programming/tutorials/basics-of-combinatorics/

2.Maths for competitive programming:

https://www.topcoder.com/community/competitive-programming/tutorials/mathematics-for-topcoders/

3. Advanced tutorial(dp+combinatorics) :
https://codeforces.com/blog/entry/54154

Where to find problems on combinatorics?

1. https://a2oj.com/category?ID=90
2. https://codeforces.com/problemset?tags=combinatorics
3. https://www.codechef.com/tags/problems/combinatorics

Happy coding(thecodingbot.com, t.me/computerprogrammingcodingbot)

Count the number of nodes in a circular linked list

Problem Statement Given a circular linked list, you have to count the number of nodes in it. For example: A Circular linked list with a total of 6 nodes. Solution Well, there is only one…

https://thecodingbot.com/count-the-number-of-nodes-in-a-circular-linked-list/

I apologize for not being active for couple of days. Will be posting regularly from 3rd. Any ideas feedback write to: thecodingbot@gmail.com

LeetCode – 175. Combine Two Tables

Problem Statement Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | PersonId | int | | FirstName | varchar | | LastName | varchar | +-------------+---------+ PersonId is the primary key column for this…

https://thecodingbot.com/leetcode-175-combine-two-tables/

The blog and this channel has not been active for some time now. I have been going through some rough patches in my personal life and not really sure when will I be able to continue posting. All the members are welcome to stay as I am not going to delete the channel or blog but can't assure you when will I be able to make a comeback. You guys were amazing audience.

A good article on how to use Unsupervised Learning (K Means) + NLP https://medium.com/@lucasdesa/text-clustering-with-k-means-a039d84a941b

**SQL**
Question—> Write a SQL query to get the nth highest salary from the Employee table.
Problem statement link —> https://leetcode.com/problems/nth-highest-salary/
Detailed solution link —> https://thecodingbot.com/leetcode-177-nth-highest-salary/

Attempt the problem by yourself first :)

Different type of machine learning explained - https://thecodingbot.com/different-type-of-machine-learning-supervised-unsupervised-and-reinforcement-learning/

How to check the version of Pandas?

Table of Contents SolutionSolution 1 – GEt version number with __version__ attributeSolution 2 – Using pip Freeze + GrepSolution 3 – With PIP SHOW Solution There are several ways you check the version of pandas you are…

https://thecodingbot.com/how-to-check-the-version-of-pandas/

Any Feedback/Suggestions ? Drop a comment on the group above

A telephonic level interview problem -

Given (x,y) coordinates of n houses, where should you build a road parallel to the x-axis to minimize the construction cost of building driveways?

https://thecodingbot.com/given-xy-coordinates-of-n-houses-where-should-you-build-a-road-parallel-to-the-x-axis-to-minimize-the-construction-cost-of-building-driveways/

Happy holi fellas!!!

Rearrange a linked list such that all even index nodes come after all odd index nodes

Table of Contents Problem StatementSolutionApproachHere are the steps in detailImplementation of the Above Approach Problem Statement Given a singly linked list, group all odd nodes together followed by all the even nodes. Please note here…

https://thecodingbot.com/rearrange-a-linked-list-such-that-all-even-index-nodes-come-after-all-odd-index-nodes/

Get unique values from a Pandas column preserving the order of appearance

Introduction There are several ways to get the unique values from a column in a Pandas DataFrame, but in this tutorial, we will focus more on how we can keep the order of appearance(without rearranging…

https://thecodingbot.com/get-unique-values-from-a-pandas-column-preserving-the-order-of-appearance/

Remove duplicates from a Pandas DataFrame with two or more column in the subset criteria

Introduction There are some functions available to remove duplicates or identify duplicated rows in the dataframe in Pandas. One such function is df.duplicated() and the other function is df.drop_duplicates(). df.duplicated() not exactly removes duplicates from the dataframe but it…

https://thecodingbot.com/remove-duplicates-from-a-pandas-dataframe-with-two-or-more-column-in-the-subset-criteria/