"Whenever you find yourself dealing with ranges, think about storing data in cumulative form."

Read more about "Accumulation and Prefix Sums" here. Would love to hear any feedback.

"In many cases it’s a lot easier or more efficient to solve a problem by trying to move from the end to the start rather than the other — more straightforward — way around."

Read more about "thinking backwards" here. Would love to hear any feedback.

Here is my latest Algorithmic Gems post on Medium and YouTube, In this post I take about improving algorithms space complexity. Would love to hear any feedback or questions, also please share with anyone who might find it useful.

I'm starting a series of short videos on YouTube to talk about some advanced algorithmic ideas that aren't typically captured in textbooks. Check out the latest video here. Would love to hear your feedback.

Is rating affected by reading the problems or I must make a submission ? Is this mentioned anywhere in the rules ?

Thanks.