AtCoder is a competitive programming platform and online judge system that regularly hosts programming contests and provides you with a practice environment. It was created in Japan and it has gained popularity among the competitive programming community
About the Dynamic Programming Contest It is an unofficial contest to practice DP (Dynamic Programming). They selected 26 DPs, mostly basic ones, and prepared a problem to learn each of them.
Links: [1] https://atcoder.jp/contests/dp/tasks [2] https://www.youtube.com/playlist?list=PL6h2Gn3JK5Lnew3sVMFp0...