This is where I practice my Katas (Kata is for Martial Arts, what Algorithm && Data Structures are for programmming.) Problems comes from various sources, such as LeetCode (https://leetcode.com/problemset/all/), Cracking the coding interview (Gayle Laackman Mcdowell), TryAlgo Problems (https://tryalgo.org/problems/), BattleDev ISOGRAD (https://www.isograd.com/FR/solutionconcours.php), AtCoder (https://atcoder.jp/contests/archive), Project Euler (https://projecteuler.net/archives), Edabit (https://edabit.com/challenges), CSES (https://cses.fi/problemset/).