Rajan Kumar

work HackersFriend

place Gurugram, India

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

HackersFriend @rajan ( Joined 1 year, 3 months ago )




Rajan Kumar

Rajan Kumar published an article

1 day, 15 hours ago


Add two numbers without using arithmetic operators


Rajan Kumar

Rajan Kumar published an article

2 days, 16 hours ago


Efficient Method to Check if a Number is Multiple of 3


Rajan Kumar

Rajan Kumar published an article

2 days, 17 hours ago


DNA to Protein Converter using Python 3 and Django 2.1


Rajan Kumar

Rajan Kumar published an article

5 days, 4 hours ago


Step by step guide to improve competitive programming skills


Rajan Kumar

Rajan Kumar published an article

1 week ago


Implement a Dictionary using Trie


Rajan Kumar

Rajan Kumar published an article

1 week, 5 days ago


Range Trees


Rajan Kumar

Rajan Kumar published an article

1 month ago


How to prepare for Google Kickstart – a CodeJam competition?


Rajan Kumar

Rajan Kumar published an article

1 month, 3 weeks ago


HackersFriend Graduated from Y Combinator's Startup School


Rajan Kumar

Rajan Kumar published an article

3 months ago


Find maximum occurring character in a string


Rajan Kumar

Rajan Kumar published an article

3 months ago


Sort an array without changing position of negative numbers


Rajan Kumar

Rajan Kumar published an article

3 months, 1 week ago


What is Binary Search Tree (BST) ?


Rajan Kumar

Rajan Kumar published an article

3 months, 1 week ago


Merge two Binary search Trees with constant extra space


Rajan Kumar

Rajan Kumar published an article

3 months, 3 weeks ago


How to generate OTP (One time password) using python


Rajan Kumar

Rajan Kumar published an article

3 months, 4 weeks ago


Get current weather of any city with python using openweathermap API


Rajan Kumar

Rajan Kumar published an article

3 months, 4 weeks ago


Getting real time currency exchange rate using Python


Rajan Kumar

Rajan Kumar published an article

4 months ago


Amazon Product Price tracking using Python


Rajan Kumar

Rajan Kumar published an article

4 months ago


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


Rajan Kumar

Rajan Kumar published an article

4 months ago


Django optimizing Database queries


Rajan Kumar

Rajan Kumar published an article

4 months, 1 week ago


Check whether two strings contain same characters in same order


Rajan Kumar

Rajan Kumar published an article

4 months, 1 week ago


Count duplicates in a given linked list


Rajan Kumar

Rajan Kumar published an article

4 months, 1 week ago


Function Pointers in C++


Rajan Kumar

Rajan Kumar published an article

4 months, 1 week ago


Remove an element to maximize the GCD of a given array


Rajan Kumar

Rajan Kumar published an article

4 months, 2 weeks ago


Find Sum of all Submatrices of a Given Matrix


Rajan Kumar

Rajan Kumar published an article

5 months, 2 weeks ago


Length of longest sub-array with maximum arithmetic mean


Rajan Kumar

Rajan Kumar published an article

5 months, 3 weeks ago


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



Rajan Kumar

Rajan Kumar published an article

10 months ago


Top 10 jobs that will have high demand in future


Rajan Kumar

Rajan Kumar published an article

10 months ago


Top 5 Tv shows Programmers must watch