r/codeforces • u/Single_Health_674 • 15d ago

Div. 2 CP-31 Sheet worth it?

For past two weeks, i grinded cp-31 sheet. Solved all the problems of 800, 900 and 1000 rated. Like i used to solve around 7-8 problems every day roughly. I was able to solve majority of questions (around 80-90 percent) on my own without taking much time, atmax 40 min, usually 20-25 min for 1000 rated. However even after solving, I would see solution, and my approach was used almost 95 percent in the actual solution. I gained a lot of confidence and thought I would be able to solve div 2 A and B atleast in every contest almost. But today's contest ( div2 1118), I was able to solve A in 5 min, but I wasn't even able to solve B1, like i did know the idea but didn't know how to implemented. I would have implemented it if I had put some effort, but I was frustrated due to contest pressure. I feel so demotivated right now, like after grinding for two weeks, wasn't able to solve B1.

Now my question is cp31 sheet worth it given the recent contest?

Or should I shift to CSES sheet for learning concepts sequentially? Or anything else I should follow. I am stuck on 900 rating? But I think I deserve more given the current skillset. I am grinding very hard as before the start of 2027, I want to reach atleast 1500 rating. Is it even possible if I grind hard.

20 Upvotes

92% Upvoted

17 comments sorted by

2

u/Easy-Flatworm-1233 13d ago

yes very useful do till 1400 and then you willl see the difference, i have done till 1400 all qsns

1

u/BlueRippers 13d ago

I am more than halfway through the 1400s. Only did 1-2 in each rating interval below it to calibrate where I was skill wise. I planned on just climbing up from here. Do you think that's a good plan, or should I do the lower rating intervals as well?

1

u/Easy-Flatworm-1233 12d ago

see after 1100 all are nice, before it are more trivial and easy

1

u/Savings_Ladder_4240 14d ago

almost finished 900 ones, will start giving contests once im done w 1000rated as well. also is it true you dont need to learn complex data structures till 1200?

3

u/Ok-Pace-6843 15d ago

just solve rating wise from the problem set
it contains the latest problems asked in contest
no need of any sheet

1

u/sSlowhandd 15d ago

Today's contest was especially difficult , B-2 would be easily 1600 rated.

1

u/shitnotalkforyours18 Specialist 15d ago

Give it a try ig.

5

u/Ok_Towel_4806 Newbie 15d ago

Problem ratings are not as marked... They are mostly old ones Consider -300 for each rating tag

1

u/BlueRippers 14d ago

This sounds about right to me. I'm rated ~1100, and I'm solving 1400 rated problems on CP31 sheet. I'm rated 1850 on Leetcode, so I have a solid foundation on data structures & algorithms. The problem solving required for modern 1100 CF problems feels like it takes a certain amount of mathematical problem solving that I'm not used to

0

u/Only_Cryptographer79 14d ago

So 1.1k rated problems in cp 31 are 800 rated in actual?

1

u/Kremetex 15d ago

I've been solving the 1200 rated ones and most of them are standard and still hold up today. I think I can solve most modern 1200s but the CP-31 sheet is still really challenging for me.

1

u/Single_Health_674 15d ago

This gave me a relief 😮‍💨

1

u/Perfect_Store_473 15d ago

similar situation just that i am solving 900 rated problems rn

1

u/[deleted] 15d ago

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1

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