[2022] Algorithm weekly report

[ledongthuc]

Every week, we pick algorithm problems to solve and post them to this ticket.
At 00:00 on Sunday (VN time), we run an automation tool to merge solution PRs and collect scores. The score report will follow the problems.

Mapping of GitHub account and slack account is defined in https://github.com/ruby-vietnam/hardcore-rule/blob/master/algorithms/PARTICIPANTS.md

The source code of the automation tool is in https://github.com/ruby-vietnam/hardcore-rule/tree/master/algorithms/collector

Mapping of problem's level and the score is defined in this issue content.

Weekly problems are posted in this issue follow the format:

Weekly Problem: Season x - Week y

<Level>: <URL>
Easy: https://leetcode.com/problems/two-sum/
Medium: https://leetcode.com/problems/generate-parentheses/

Level - Score mapping:

*** Score mapping ***
Easy: 1
Medium: 2
Hard: 3
*** End score mapping ***

Last year report: #1408