Problem Solving

2022

Find and Replace Pattern LeetCode Solution LeetCode Jul 30

2020

HackerRank SQL Solutions SQL Jul 20

HackerRank Regex Solutions Regex Jul 20

2019

O(1) solution for: 1+(1+2)+(1+2+3)+...+(1+2+3+...+n) Aug 03

Using Kamenetsky's formula to count digits in a factorial Jul 18

Angle between hour and minute hand Jul 14

Check if given four points form a square or not? Jul 05

Dynamic Programming: Get Started in 2 Minutes Jul 01

Sieve of Eratosthenes Jun 25

Primality Test Jun 24

Given a string "3(ab)4(cd)" expand it into "abababcdcdcdcd" Jun 21

2018

Automorphic Number Oct 08