Wrote 2 Educational contests Codeforces: one virtual and one online.

Problem D confused me. The task was to find the length of maximal subsequence with lcm ≤ m. I tried to think about different approaches. DP? I can’t come up with states. Factorization? No ideas how to fit it in…


Interesting task on segment tree from virtual CF Educational 6. Again you see tree and queries in subtrees, so may be it is tin-tout ST? Yes, it is. But here you should maintain info about ≤ 60 unique elements in each node and do lazy propagation. So may be merging…


It was a harsh day for me as I was very tired. So I don’t want to write a huge story today with descriptions of all tasks and their solutions. Just some notes.

I wrote Umnik’s Day 5 contest and Div. 3 on Codeforces. 5 + 5 problems AC. Div…


Today was an upsolving day. There were some tasks that had been implemented before, but hadn’t got AC.

One of these tasks is B from Umnik’s Day 3. The idea of solution came from his analysis. The problem is: you have an array h of length n and m queries…


07.07.2021 — Upsolving of Umnik’s Day 4 and Codeforces Div. 2 Round 730

Talking about round, 4 tasks were solved — A, B, C, D1

I was stupid a lot during the contest. D1 is very easy task, but I spent too much time. It could be solved much quicker…


Today was Day 3 of Umnik’s intensive. I solved 4 tasks on contest — A, F, I, N. And 1 task was upsolved — O.

I rate myself low today as I were not efficient. In the first part of contest I missed 2 easy tasks — N and F


I was too lazy to fill this blog by 1 story per day. So it will be story about three days of training.

It was a contest on Codeforces on the 3rd of July. It was not very successful but result was descent, because I was fast enough. …


First day of Umnik’s summer intensive. I solved 5 tasks — A, C, D, K, O

The most significant mistake of the whole contest was the fact that I did 11 submissions on problem O. That was some greedy idea with STL set or map, so it was O(nlogn) with…


I decided to start this blog to track my progress.

I started my day with Atcoder Beginner contest. I believe it was my most successful one as I stayed at 22th place at the moment I had all tasks being accepted. To be true tasks were easy and I spent…

Vladislav Remidovskiy

competitive programmer

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