I practice questions in Codeforces Problemset by hiding tags for unsolved problems. However, sometimes it turns out to be a April Fools question and sometimes after spending 30-40 mins in a question I find that what was a Kotlin only problem, then I re-write my whole approach in Java then download Jetbrains IDE to convert that to Kotlin, and most of times I don't get AC as I don't know Java well. These things wastes time!

Currently in CF, we can see problems for a particular tag using the filter box in right side, but there is no option to remove problems for a particular tag (*special problem in this case) using the filter.

I request the admins to add this feature.

I was solving this problem on cf . My c++ code got accepted but it is giving segmentation fault in my local computer. Why is it so? I also tried other online compilers like ideone , and it was working there too.

Same case with java. My java code got AC in cf but gives stackoverflow error in my computer.

My operating system is Ubuntu 20.04

I was solving this question https://codeforces.net/contest/1132/problem/F using the editorial's method.
Only difference is, I was using iterative dp rather than recursive dp.

My submission https://codeforces.net/contest/1132/submission/114519575
Copy pasted editorial submission https://codeforces.net/contest/1132/submission/114519641

I thought N=500 will give TLE in a O(N^3) solution, however it passed and in less time than the editorial's solution which I think is in O(N^2).

Why is it so? Also, is the editorial solution really O(N^2) or am I wrong? What should be the constraints on N to pass a O(N^3) solution as a general rule of thumb?

Hello Codeforces!

I have subscribed to Codeforces Google Calendar https://codeforces.net/calendar so that I don't miss any codeforces contests. I have also added notifications (for 6 hrs and 1 hr before) as email and on the phone.

But recently, codeforces stream started streams (I am not interested in attending them), and I am getting unnecessary notifications on my mobile and Gmail inbox.

I suggest the codeforces admins to have a separate google calendar for the streams, as not everyone wants to attend them.

UPDATE : You can access separate google calendars of different coding websites here https://clist.by/resources/. It also has codeforces google calendar, and not with the streams.