What I've done today is Secret Messages of Number Theory and Course Schedule II in JavaScript.

Due to the high cost of [brilliant.org]'s subscription, and low difficulty, I decide to change to https://projecteuler.net. So again, if there is no source provided, I'm doing challenge with it and https://LeetCode.com

What I've done today is Last Digits of Number Theory and Longest Substring Without Repeating Characters in JavaScript.

If no source is provided, then I'm doing these challenge at https://brilliant.org and https://leetcode.com/.