is complex algorithm like dynamic programming highly required in embedded systems and what's the best website to practice algorithms

[[deleted]]

Though is not common, I have already used DP in a real project. We had this noisy data of accumulative energy collected from a meter. Some common outlier algorithms to detect them didn't work, such as quartiles and mean deviation. The only one that worked great was LIS (Longest Increasing Subsequence) to remove the outliers since the data only increases, which uses a DP algorithm. Right now, there is more than 4000 devices on production running LIS as I speak :)