"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.
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"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.
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.
The problem is that most of the times I navigate through the website (it happened to me twice while writing this post) there is a period of time (like 3 minutes) during which I can't access the website (I can't even ping codeforces.com). I have no idea why this happens, and it really frustrates me (specially when it happens just before the end of the contest), to resolve this issue I keep refreshing the page for few minutes until it's back!
This is a frequent issue that happens to me since a long time, I'm not sure if anybody else here is experiencing it too but I appreciate if one of the admins looks into the issue and comment here.
Thanks in advance!
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