windva's blog

By windva, history, 13 months ago, In English

1882A - Increasing Sequence

Tutorial

1882B - Sets and Union

Something to say
Hint 1
Hint 2
Tutorial

1882C - Card Game

Hint 1
Tutorial

1882D - Tree XOR

Hint 1
Hint 2
Hint 3
Tutorial

1882E1 - Two Permutations (Easy Version)

Hint 1
Hint 2
Hint 3
Hint 4
Tutorial

1882E2 - Two Permutations (Hard Version)

Special thanks to kizen providing an key idea which motivated me to make this problem!

Hint 1
Hint 2
Hint 3
Tutorial
Challenge

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By windva, history, 13 months ago, In English

Hello, Codeforces!

I am pleased to invite you to participate in Codeforces Round 899 (Div. 2), which will be held on 25.09.2023 17:35 (Московское время).

All problems were written and prepared by me.

You will be given 5 problems, and one of them is divided into two subtasks. You will have 2 hours to solve them.

I would like to thank:

Score distribution: $$$500 - 1000 - 1500 - 2000 - (2000 + 2000)$$$

Good luck and enjoy the round!

UPD: Editorial is out.

UPD2: Congratulations to the winners!

Official Contestants

  1. Lycorisqwq
  2. zepto
  3. vjudge39
  4. Beelzebub_blue
  5. _t_W_

Official + Unofficial Contestants

  1. ksun48
  2. jiangly
  3. antontrygubO_o
  4. Sugar_fan
  5. KumaTachiRen

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