Abbyy Cup 2.0 - Final (unofficial)

Solutions for Abbyy Cup 2.0 - Final (unofficial) (contest 207). 14/17 problems verified against sample I/O. Difficulty range: 1600-2700.

17 items

Abbyy Cup 2.0 - Final (unofficial)

Type: Special | Problems: 17 | Verified: 14/17 | Rating range: 1600-2700 | Time: 25m 3s

Problem	Name	Rating	Tags	Solve Time	Verified
A1	Beaver's Calculator 1.0	1600	greedy	1m 9s	✓
A2	Beaver's Calculator 1.0	1800	greedy	1m 11s	✓
A3	Beaver's Calculator 1.0	2000	greedy	1m 43s	✓
B1	Military Trainings	1600	-	1m 47s	✓
B2	Military Trainings	1900	-	1m 54s	✓
B3	Military Trainings	1700	-	1m 42s	✗
C2	Game with Two Trees	2200	-	1m 46s	✗
C3	Game with Two Trees	2700	data-structures	2m 32s	✗
D1	The Beaver's Problem - 3	1800	-	36s	✓
D10	The Beaver's Problem - 3	2100	-	1m 25s	✓
D2	The Beaver's Problem - 3	2000	-	1m 13s	✓
D3	The Beaver's Problem - 3	2000	-	1m 13s	✓
D5	The Beaver's Problem - 3	1600	-	1m 7s	✓
D6	The Beaver's Problem - 3	2100	-	1m 24s	✓
D7	The Beaver's Problem - 3	1600	-	1m 36s	✓
D8	The Beaver's Problem - 3	2300	-	1m 24s	✓
D9	The Beaver's Problem - 3	1800	-	1m 21s	✓

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CF 207A1 - Beaver's Calculator 1.0

We are given several scientists, each producing a sequence of computational tasks. Every task has a fixed resource requirement, and within each scientist’s list the tasks must be executed in the given order.

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CF 207A2 - Beaver's Calculator 1.0

We are given several independent sequences of integers, one sequence per scientist. Each sequence must be kept in its original internal order, but we are allowed to interleave these sequences arbitrarily when forming one global list.

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CF 207A3 - Beaver's Calculator 1.0

Each scientist gives us a sequence of tasks. Inside one scientist's sequence, the order is fixed and cannot be changed. Between different scientists, we may interleave tasks however we want.

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CF 207B1 - Military Trainings

The column of tanks changes after every message. At any moment, the current first tank must send a message to the current last tank through a sequence of intermediate tanks. Suppose a tank currently stands at position j in the column and its receiving radius is a[x].

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CF 207B2 - Military Trainings

The order of tanks changes after every message. At any moment, the column is some cyclic rotation of the original sequence. Suppose a tank currently stands at position i in the column and wants to send the message to a tank at position j i.

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CF 207B3 - Military Trainings

We are given a column of tanks, numbered from 1 to n, each with a message receiving radius. The goal is to transfer n messages from the front of the column to the end under specific rules.

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CF 207C2 - Game with Two Trees

We are working with two dynamic rooted trees that start with a single node each. Operations are sequential and extend the trees by attaching a new child to an existing node with an edge labeled by a lowercase English letter.

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CF 207C3 - Game with Two Trees

We maintain two rooted trees. Initially each tree contains only the root vertex 1. Every operation adds one new vertex to one of the trees. The new vertex becomes a child of an existing vertex, and the connecting edge stores one lowercase letter.

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CF 207D1 - The Beaver's Problem - 3

This problem requires us to classify a document into one of three subjects based on its textual content. Each document consists of an identifier, a name, and a body of text.

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CF 207D10 - The Beaver's Problem - 3

This problem is unusual compared to standard Codeforces tasks because it is not asking for a mathematical algorithm or a data structure. We are given a document, consisting of a title and body text, and we must classify it into one of three categories.

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CF 207D2 - The Beaver's Problem - 3

This problem is unusual for Codeforces because it is not a traditional algorithmic task. We are given a single document and must classify it into one of three categories using a provided training dataset. The input contains an identifier, a title, and the full document text.

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CF 207D3 - The Beaver's Problem - 3

This problem is intentionally unusual for Codeforces. There is no mathematical formula, graph structure, or dynamic programming hidden in the statement. Instead, we are asked to classify a text document into one of three categories using a training dataset.

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CF 207D5 - The Beaver's Problem - 3

This problem is unusual compared to standard competitive programming tasks because the original contest expected participants to build a document classifier from a training dataset.

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CF 207D6 - The Beaver's Problem - 3

This problem is not a traditional algorithmic task. Instead of processing arrays or graphs, we are given a text document and must determine which of three categories it belongs to. A training dataset is provided externally, containing labeled examples for all three subjects.

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CF 207D7 - The Beaver's Problem - 3

This problem is intentionally unusual for Codeforces. There is no hidden graph, no combinatorics trick, and no numeric constraint to optimize around. Instead, we are asked to classify a text document into one of three categories using a fixed training corpus.

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CF 207D8 - The Beaver's Problem - 3

This problem is very different from a standard algorithmic task. We are not given arrays, graphs, or numeric constraints. Instead, we receive a text document and must predict which of three categories it belongs to. The input contains three parts.

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CF 207D9 - The Beaver's Problem - 3

In this problem, we are given a document with three components: an identifier, a title, and the main text. Each document belongs to one of three subjects, labeled 1, 2, or 3. The task is to determine the correct subject for any given document.