I have tried to create Video tutorials for DP and Square root decomposition, using the problems of Codathon (Inter NIT) 2020. So the videos are a bit lengthy but you can always skip for direct problem solution.
DP: Dynamic Programming Tutorial with a Example Question (Codathon 2020- Day3)
SQRT decomposition: Square root decomposition Tutorial with example (Codathon 2020 Day 7)
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