anishukla / hacktoberfest-2021-data-structures-and-algorithms

This repository is mainly open to those who are looking to make some PRs for the Hacktoberfest 2021 event. In this repository, you can add programs on Data Structures and some useful algorithms for Competitive Programming.

Data Structure and Algorithms

This repository is mainly open to those who are looking to make some PRs for the Hacktoberfest event. In this repository you can add programs on Data Structures and some useful algorithms for Competitive Programming in any language of your choice. You can also include major problems from codechef, hackerrank, leetcode, interviewbit, or any other CP portal.

How to contribute:

Find the folder that fits the category of your code and submit a PR.

Star this repo if the information here is useful to you.

Contributing Guidelines :

Thanks for taking the time to contribute to this project. Before making PRs, please note the following:

A few norms you should follow :

• Proper indentation is must!
• Include Sample comments so that code is understandable and easy to follow.
• Mention the complexity in a comment.
• Place your code in right directory.
• Give your files names that are relevant and meaningful for example : SubsetSum.py
• If you will follow all the guidelines while contributing I'll be merging all your changes into the master branch of this project.
• Mention your name in form of a comment inside your code.

Hacktoberfest-2k21 bash

Do you have a solution for a problem which isn't already present? Want to complete four PRs for Hacktoberbest-2k21. Send a PR of your solution in any programming language.

Check your current hacktoberfest progress

Learning resources

Learn Git basics.

Creating a pull request.

Contact

Let's Connect

• Github
• Linkedin
• Twitter

Keep On Exploring Open Source and Happy Learning!

hacktoberfest-2021-data-structures-and-algorithms's Issues

Right rotation Bits

Example - Right rotation of
n = 11100101 by 3
makes n = 10111100

Language - Python.

Add DP Problems Folder

HI Anishukla Can we add dp problems into this reposotory

Request to add a new folder to the repo

Can I add a New folder to the repo
Hackerrank SQL Problems ?

Adding Queue implementation using Linked Lists in Python.

I want to add Linked List implementation of queue in easy to understand way using Python as the solutions available are using normal Lists. Please assign this to me.

Add circular queue

Create Tree using Inorder and PostOrder traversal

Hi, I would like to add the code for creating a tree using Inorder and PostOrder traversal in C++ with proper commenting and explanation. Please assign this issue to me.

Java version of Two sum ,3sum

I want to add java solution for Two sum , 3sum and other problems.

LeetCode Problem: 153.Find Minimum in Rotated Sorted Array in Java

LeetCode Problem: 153.Find Minimum in Rotated Sorted Array in Java
Problem Link - https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/
PR: #254

Infix to Postfix expression conversion

I have to add a C++ solution for infix to postfix expression conversion in stack.

Please, assign this issue to me under Hacktoberfest'21.

[LeetCode] 189. Rotate Array

Hi 👋
I want to contribute on this repository by solving 189. Rotate Array
@Anishukla Can you assign this (under hacktoberfest-2021 label) to me? 🤔

Add jump search

Kruskals Algo for Graph

MST is a tree which has no cycle and minimum wieghted edge

Algo to implement MST:

Sort according to wieght;
Using DSU try to find that respective edge form a cycle or not if not add the edge.

Ternary Search in c++ (Under HacktoberFeast)

Hey @Anishukla,

Motive

I want to add Ternary Search Algorithm in C++.

Detail

Ternary Search is an algorithm to search data in a given list.
It takes O(log3 n) Time complexity and O(1) Space complexity.

Ending

Please assign it to me under Hacktoberfeast

KMP String matching algorithm in C++

I would like to contribute a C++ solution for KMP String matching algorithm. @Anishukla could you assign this issue to me?

Add Custom Github issues and Pull request templates?

Hi, I want to add custom issues and PR templates to this repo. so, please tell me that which type of issue template(Linke NewProblem, Bug, etc).

Waiting for your reply.

Hacktoberfest-2020

Hello folks, Want to contribute to Hacktoberfest.
Confused about what to contribute?
Let's make your task simpler.
Go and check out the README of this repo and start contributing!
Generate PRs for Hacktoberfest-2020 just by solving problems on Data Structures and Algorithms.
Happy Learning!!!

[LeetCode] 61. Rotate List

Hello again 👋
I'm working on a solution for the LeetCode problem 61. Rotate List...
@Anishukla Can you assign this (under hacktoberfest label) to me?

Valid Shuffle Problem

I want to solve the problem where a string is validated if it is a valid shuffle of the two string provided.

Hackerrank: 30 days of code in JavaScript

Hey I have added some JavaScript codes for "30 days of code", please check my pull request #208

Add a Leetcode problem

I want to add a Leetcode problem " Detect cycle in a Linked List "
Can you assign me this?

Hacktoberfest-Accepted label

Hey @Anishukla can you please add the label of hacktoberfest-accepted in these PR's #219 #222 #198 #192

Postfix Expression Evaluation (Stacks)

I want to add code for Postfix Expression Evaluation.
In this Input will be Postfix Expression on which particular operations will be performed using stacks and output will be the result of that expression.
Eg. Input => 4 6 + 2 / 5 * 7 + Output => 32
Evaluation =>((((4+6)/2)*5)+7)

Please, assign this issue to me under Hacktoberfest'21.

Hacktoberfest-2021

Hello folks, Want to contribute to Hacktoberfest.
Confused about what to contribute?
Let's make your task simpler.
Go and check out the README of this repo and start contributing!
Generate PRs for Hacktoberfest-2021 just by solving problems on Data Structures and Algorithms.
Happy Learning!!!

Prefix Expression Evaluation (Stacks)

I want to add code for Prefix Expression Evaluation in C++.
In this Input will be Prefix Expression on which particular operations will be performed using stacks and output will be the result of that expression.
Eg. Input => - + 7 * 4 5 + 2 0 Output => 25
Evaluation =>((7+(4*5))-(2+0))

Please, assign this issue to me under Hacktoberfest'21.

Please add a folder for Hackerrank C++ problems.

I want to contribute to this repository but didn't found any directory related to Hackerrank C++ problems. Please add the folder where people can contribute to C++ problems.

Array and simple queries (hackerrank question)

I would like sincerely work on this issue. Please assign me this issue.

Binary Tree Traversal using Recurssion

Hello, I want to work on Binary Tree Traversal using Recursion which is currently not present. Can I work on this?

Implement Queue using Stacks

Implementing Queue using Stacks in Java
PR : #214
@RahulBansal0502 I have raised a PR for this issue.

Linked List Cycle

I have added solution for leetcode 141 problem - Linked List Cycle solution in c++

PR:- #216
I have raised a PR @Anishukla

Added Code for non recursive inorder, postorder and preorder traversal in binary tree.

Dp: Maximum Sum Increasing Subsequence

Description:
Tag: Dynamic Programming
: find the sum of maximum sum subsequence of the given array

LeetCode: 718. Maximum Length of Repeated Subarray in Java

Problem : Leetcode - https://leetcode.com/problems/maximum-length-of-repeated-subarray/
718. Maximum Length of Repeated Subarray
Language- Java

PR: #300

Example 1:
Input: nums1 = [1,2,3,2,1], nums2 = [3,2,1,4,7]
Output: 3
Explanation: The repeated subarray with maximum length is [3,2,1].

Added code for JS Palindrome search Algorithm

I Would love to add some code on matrix Data Structure

Code effectively talk about storing the most effective way in terms of memory
I wish to add the following matrix:-

1. Diagonal Matrix

2. Lower Triangular && upper Traiangular

3. Symmetric Matrix

4. Toeplitz Matrix

5. Triadiagonal Matrix

if you allow me to add these codes to your ds folder I will be so happy to contribute

Thanks
cheers