Sometimes I stuck in div2 B and can solve C easily than B. Is it important to practice 800-1300 rated problems also to maintain the speed? How many those problems need to be practiced daily? What is your strategy?
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I believe doing one problem in 800-1300 daily will help u maintain the speed
i also have the same question, i am stuck at B in contests.
I had been in a very similar situation. Even nowadays I feel B/C not easy from time to time. But I seldom practice problems with low rating, the only practice I've done is during contests. So I think you could just participate in more rounds, and use your training time to deal with harder problems.
I think the important things is, it's not worthy to practice problems of a level all the way until you can solve all problems of their level. If you solved C but didn't solve B, then good, learn the trick/observation you are missing and carry on. Don't let it disturb your scheme.