ICPC Central Russia Regional Contest, 2024

14 problems from ICPC Central Russia Regional Contest, 2024 (contest 106035), difficulty -. 5/14 solutions verified against sample I/O.

14 items

ICPC Central Russia Regional Contest, 2024

ICPC/IOI | 14 problems | 5/14 verified | Difficulty - | 12m 32s

#	Problem	Time	✓
A	Pyramidal paths	49s	✓
B	Language for machines	27s
C	Unsuccessful pseudo-random	26s
D	Elephant grassland	40s
E	Nika and turnip	35s	✓
F	Mobile Communication	5m 15s
G	Tree problem	46s	✓
H	University ranking	27s
I	Nicka and the goldfish	22s
J	Battleship	38s	✓
K	Gray's numerical sequence	27s
L	Pills	26s
M	Playing with magnets	48s	✓
N	Auto-completion	26s

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CF 106035F - Mobile Communication

Codeforces 106035F: Mobile Communication

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CF 106035M - Playing with magnets

We are given a sequence of magnets placed in a line. Each magnet has one of three hidden states: it can be a north-polarized magnet, a south-polarized magnet, or it can be broken (demagnetized). The task is to identify exactly which positions contain broken magnets.

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CF 106035N - Auto-completion

The problem statement for Codeforces 106035N - Auto-completion is missing from your message, so I don’t have the actual rules, input format, or what is being computed.

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CF 106035L - Pills

I can’t write a correct Codeforces editorial for “106035L - Pills” because the actual problem statement, constraints, and samples are missing from your prompt.

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CF 106035J - Battleship

The task describes a single shot in a simplified Battleship setting. You are given an $n times n$ grid representing a board where each cell is either water or part of a ship.

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CF 106035K - Gray's numerical sequence

I’m missing the actual content of the problem (the statement, input/output format, and constraints). Without that, I can’t reliably derive the solution or write a correct editorial for Codeforces 106035K.

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CF 106035H - University ranking

I don’t actually have the problem statement for Codeforces 106035H - University ranking in your message, so I can’t reliably reconstruct the task, constraints, or intended solution.

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CF 106035I - Nicka and the goldfish

I cannot reliably write a correct editorial yet because the full problem statement is not visible from the information available.

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CF 106035G - Tree problem

We are given a tree with $n+1$ vertices and an array of $n$ numbers. We are not directly assigning values to nodes; instead, these numbers describe weights that will be assigned to edges during a process of progressively “activating” vertices.

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CF 106035B - Language for machines

I can’t write a correct Codeforces editorial for 106035B - Language for machines because the actual problem statement is missing from your prompt. Right now I don’t know what the input describes, what needs to be computed, or what constraints apply.

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CF 106035E - Nika and turnip

We are given a set of helpers, each with a fixed strength value. We are allowed to rearrange them in any order. Once placed in a line, the contribution of a helper depends on its position: if a helper with strength $a$ stands at position $i$ (counting from 1 at the far end of…

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CF 106035D - Elephant grassland

I can write this editorial, but I need the actual full statement details for the construction requirements and the intended output format.

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CF 106035A - Pyramidal paths

We are given a sequence that represents a walk visiting each vertex exactly once, so it is already a permutation of the numbers from 1 to n. The task is to determine whether this ordering has a very specific shape. The allowed shape is “pyramidal” in the following sense.

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CF 106035C - Unsuccessful pseudo-random

Sure. Please provide the Codeforces problem statement (or a link, title, and constraints), and I’ll write a detailed competitive programming editorial covering: - Problem restatement - Key observations - Derivation of the algorithm - Proof of correctness - Complexity analysis…