Rajan Kumar

work Founder & Programmer at HackersFriend

location_on India

code Python, HTML, CSS, Django, JavaScript, Competitive programming

public https://www.hackersfriend.com

HackersFriend @rajan ( Joined 1 year, 5 months ago )


Bio: Loves to code.




Rajan Kumar

rajan published an article

1 week ago


Convert a number to a string in C - best way


Rajan Kumar

rajan published an article

1 week, 4 days ago


Building news aggregator web app with Django using python web scraping


Rajan Kumar

rajan published an article

2 weeks ago


Find Length of a Linked List


Rajan Kumar

rajan published an article

2 weeks, 1 day ago


Sort string of characters C++


Rajan Kumar

rajan published an article

2 weeks, 1 day ago


Print a matrix in spiral form


Rajan Kumar

rajan published an article

2 weeks, 2 days ago


Print reverse of a string using recursion


Rajan Kumar

rajan published an article

2 weeks, 3 days ago


Amazon Product Price tracking using Python


Rajan Kumar

rajan published an article

2 weeks, 5 days ago


Program to find the mid-point of a line


Rajan Kumar

rajan published an article

2 weeks, 5 days ago


Generate QR Code using python with pyqrcode module


Rajan Kumar

rajan published an article

3 weeks, 5 days ago


Mouse and keyboard automation using Python


Rajan Kumar

rajan published an article

3 weeks, 6 days ago


C++ Trigonometric functions


Rajan Kumar

rajan published an article

3 weeks, 6 days ago


Remove one element to maximize XOR of array



Rajan Kumar

rajan published an article

1 month, 3 weeks ago


C++ Hacks for Competitive programming


Rajan Kumar

rajan published an article

2 months ago


Add two numbers without using arithmetic operators


Rajan Kumar

rajan published an article

2 months ago


Efficient Method to Check if a Number is Multiple of 3


Rajan Kumar

rajan published an article

2 months ago


DNA to Protein Converter using Python 3 and Django 2.1


Rajan Kumar

rajan published an article

2 months, 1 week ago


Step by step guide to improve competitive programming skills


Rajan Kumar

rajan published an article

2 months, 1 week ago


Implement a Dictionary using Trie


Rajan Kumar

rajan published an article

2 months, 2 weeks ago


Range Trees


Rajan Kumar

rajan published an article

3 months ago


How to prepare for Google Kickstart – a CodeJam competition?


Rajan Kumar

rajan published an article

3 months, 3 weeks ago


HackersFriend Graduated from Y Combinator's Startup School


Rajan Kumar

rajan published an article

5 months, 1 week ago


Find maximum occurring character in a string


Rajan Kumar

rajan published an article

5 months, 1 week ago


Sort an array without changing position of negative numbers


Rajan Kumar

rajan published an article

5 months, 1 week ago


What is Binary Search Tree (BST) ?


Rajan Kumar

rajan published an article

5 months, 1 week ago


Merge two Binary search Trees with constant extra space


Rajan Kumar

rajan published an article

5 months, 3 weeks ago


How to generate OTP (One time password) using python



Rajan Kumar

rajan published an article

6 months ago


Getting real time currency exchange rate using Python


Rajan Kumar

rajan published an article

6 months ago


Find prime numbers in the first half and second half of an array


Rajan Kumar

rajan published an article

6 months, 1 week ago


Django optimizing Database queries


Rajan Kumar

rajan published an article

6 months, 1 week ago


Check whether two strings contain same characters in same order


Rajan Kumar

rajan published an article

6 months, 1 week ago


Count duplicates in a given linked list


Rajan Kumar

rajan published an article

6 months, 1 week ago


Function Pointers in C++


Rajan Kumar

rajan published an article

6 months, 2 weeks ago


Remove an element to maximize the GCD of a given array


Rajan Kumar

rajan published an article

6 months, 2 weeks ago


Find Sum of all Submatrices of a Given Matrix


Rajan Kumar

rajan published an article

7 months, 2 weeks ago


Length of longest sub-array with maximum arithmetic mean


Rajan Kumar

rajan published an article

7 months, 4 weeks ago


Learn Full stack development from scratch part - 1 ( step by step guide )



Rajan Kumar

rajan published an article

1 year ago


Top 10 jobs that will have high demand in future


Rajan Kumar

rajan published an article

1 year ago


Top 5 Tv shows Programmers must watch