How did CSES problem-set help you improve in CP?
Who should use it?
Can it be used to prepare for ICPC, CodeJam, Hackercup?
Currently I am an expert(1800+) and want to become Master+. I also want to perform well in contests like CodeJam, HackerCup, etc. Should I solve CSES problems, or only Codeforces problems are enough?
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Why does this blog have too many downvotes? That's a very legitimate question, isn't it?
u lied thats why everyone is downvoting you !
I guess he might be 1800+ with some other account
It's no different than every other "how to improve blog", that's why. If the problems teach you new concepts, then its helpful, otherwise probably not, duh. Same with any other site. It mostly has standard fundamental algorithms important to the contests mentioned, so if you don't know those algorithms you could use the site.
If you fear getting downvotes on your real account, how will you have the courage to do the problems out of your comfort zone?
Any person with 1800+ rating wouldn't ask such questions.