2024
AshishPratapSingh - LeetCode was HARD until I Learned these 15 Patterns 0:00 of 12:59
    https://www.youtube.com/watch?v=DjYZk8nrXVY

2019
https://habr.com/company/skillbox/blog/435618/
    https://www.youtube.com/user/tusharroy2525/playlists