duality's blog

By duality, 16 months ago, In English

Video editorials for B, C, and D are available on ak2006's channel.

1844A - Subtraction Game

Hint 1
Hint 2
Solution
Implementation

1844B - Permutations & Primes

Hint 1
Hint 2
Hint 3
Solution
Implementation

1844C - Particles

Hint 1
Hint 2
Solution
Implementation

1844D - Row Major

Hint 1
Hint 2
Solution
Implementation

1844E - Great Grids

Hint 1
Hint 2
Hint 3
Hint 4
Solution
Implementation

1844F1 - Min Cost Permutation (Easy Version)

Hint 1
Hint 2
Hint 3
Solution (easy version)
Implementation

1844F2 - Min Cost Permutation (Hard Version)

These hints and solution continue from the solution for the easy version, so please read the solution for the easy version first.

Hint 4
Hint 5
Hint 6
Solution (hard version)
Implementation

1844G - Tree Weights

Hint 1
Hint 2
Hint 3
Hint 4
Hint 5
Solution
Implementation

1844H - Multiple of Three Cycles

Hint 1
Hint 2
Hint 3
Hint 4
Hint 5
Hint 6
Solution
Implementation

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By duality, history, 16 months ago, In English

Hello, Codeforces!

I invite everyone to participate in Codeforces Round 884 (Div. 1 + Div. 2), which will start on Jul/11/2023 17:35 (Moscow time). The round is a combined round and will be rated for everyone.

You will be given 8 problems and 3 hours to solve them. One of the problems is divided into two subtasks. The scoring distribution will be:

$$$500$$$ — $$$1000$$$ — $$$1250$$$ — $$$1500$$$ — $$$2000$$$ — $$$(2000+1000)$$$ — $$$3500$$$ — $$$4000$$$

All problems are written and prepared by me. I would like to thank:

I look forward to your participation and hope you enjoy the problems. Good luck!

UPD 1: Editorial

UPD 2: Congratulations to the winners!

  1. cnnfls_csy
  2. tourist
  3. DearMargaret
  4. ksun48
  5. gyh20
  6. heno239
  7. jiangly
  8. ecnerwala
  9. neal
  10. Sugar_fan

and congratulations to cnnfls_csy and orz for solving problem H!

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