ICPC Central Russia Regional Contest, 2025

13 problems from ICPC Central Russia Regional Contest, 2025 (contest 106189), difficulty -. 8/13 solutions verified against sample I/O.

13 items

ICPC Central Russia Regional Contest, 2025

ICPC/IOI | 13 problems | 8/13 verified | Difficulty - | 8m 30s

# Problem Rating Tags Accepted Time ✓
A Wallpaper 34s ✓
B Old Tetris 45s ✓
C And again the maze 1m 5s ✓
D An oscillating subsequence 39s ✓
E Pluses and minuses 41s ✓
F Classic Tetris: Scoring 39s ✓
G Card deck 18s
H IP v6 51s ✓
I Agronomist 59s ✓
J Dunno and the cubes 54s
K Factorials 23s
L Bitwise operations 23s
M Memory Manager 19s
Practice › Codeforces Solutions › ICPC Central Russia Regional Contest, 2025 ›

CF 106189M - Memory Manager

I cannot reliably reconstruct the full statement of Codeforces 106189M - Memory Manager from the identifier alone, and the problem content is not available in the context you provided.
codeforces competitive-programming Jun 25, 2026
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CF 106189L - Bitwise operations

including a full proof, implementation details, traced examples, and assert-based tests.
codeforces competitive-programming Jun 25, 2026
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CF 106189J - Dunno and the cubes

I’m missing a critical piece of information needed to write a correct editorial: the actual statement of Codeforces Gym 106189J is not included in your prompt, and the Gym page is not fully accessible from the available sources.
codeforces competitive-programming Jun 25, 2026
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CF 106189I - Agronomist

We are given a rectangular garden placed on an infinite integer grid. The rectangle is axis-aligned and described by its lower-left corner and its width and height. So every integer point inside that rectangle, including the boundary, is a potential planting location.
codeforces competitive-programming Jun 25, 2026
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CF 106189K - Factorials

I can write the editorial, but I don't have the actual statement for Gym/Codeforces 106189K "Factorials". The problem page for Gym 106189K is not publicly accessible through the available sources, and the prompt you provided contains empty sections for the statement, input…
codeforces competitive-programming Jun 25, 2026
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CF 106189F - Classic Tetris: Scoring

We are given the scoring log of a Tetris player. Each log entry tells us that the player cleared exactly 1, 2, 3, or 4 lines at once, represented by the strings single, double, triple, and tetris. The player starts at level 18.
codeforces competitive-programming Jun 25, 2026
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CF 106189G - Card deck

I can't reliably write a correct editorial for Codeforces 106189G "Card deck" because the actual problem statement is missing from your prompt, and I could not retrieve the Gym problem text from available sources. Please provide one of the following: 1.
codeforces competitive-programming Jun 25, 2026
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CF 106189E - Pluses and minuses

We are given a mathematical expression written as a string. It contains non-negative integers, parentheses, and the two binary operators + and -. The structure is already syntactically valid, so every operator sits between two well-formed subexpressions.
codeforces competitive-programming Jun 25, 2026
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CF 106189D - An oscillating subsequence

We are given an integer sequence and may delete any elements while preserving the order of the remaining ones. The goal is to keep as many elements as possible so that in the resulting subsequence every internal element is a strict peak or a strict valley.
codeforces competitive-programming Jun 25, 2026
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CF 106189C - And again the maze

We have a rectangular maze. Empty cells are traversable, cells marked X are blocked. The player starts in the top-left corner and wants to reach the bottom-right corner using four-directional moves. We want to place exactly one additional obstacle into an empty cell.
codeforces competitive-programming Jun 25, 2026
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CF 106189B - Old Tetris

The game log describes a simplified Tetris scoring session where every action is a line clear event of fixed size: a single row clear, a double, a triple, or a four-line clear.
codeforces competitive-programming Jun 25, 2026
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CF 106189A - Wallpaper

Igor has n walls. Every wall is exactly 3 meters high, and the i-th wall has width ai. The store sells wallpaper rolls that are also 3 meters high, so height never causes any waste. Each roll covers exactly k meters of width.
codeforces competitive-programming Jun 25, 2026
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CF 106189H - IP v6

The task is about normalizing an IPv6 address representation. The input is a single string consisting of hexadecimal groups separated by colons.
codeforces competitive-programming Jun 20, 2026