The 2025 Hunan University Programming Contest

12 problems from The 2025 Hunan University Programming Contest (contest 105981), difficulty -. 2/12 solutions verified against sample I/O.

12 items

The 2025 Hunan University Programming Contest

Special | 12 problems | 2/12 verified | Difficulty - | 10m 53s

# Problem Rating Tags Accepted Time ✓
A A Slide B Slide 46s
B Bricked Blast Furnaces 39s
C Echoes of the Runes 3m 50s ✓
D Keine's Prefix Sum 40s
E Neuro's New Game 39s
F Portal 37s
G Portal 2 37s
H Simai 34s
I The Dream-Quest 34s
J Uniform Random Descent Process 56s ✓
K Yet Another Connecting Problem 32s
L Yet Another Another Connecting Problem 29s
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981K - Yet Another Connecting Problem

The statement you provided is incomplete, so I can’t reconstruct what “Yet Another Connecting Problem” is asking or derive a correct solution. Right now I only see the title and some metadata, but the actual input format, constraints, and task description are missing.
codeforces competitive-programming Jun 22, 2026
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981L - Yet Another Another Connecting Problem

The statement you provided is incomplete: There is no actual description of what the problem asks, so it’s impossible to write a correct editorial or derive any solution.
codeforces competitive-programming Jun 22, 2026
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981J - Uniform Random Descent Process

We are given a process that repeatedly shrinks a single integer. Starting from a value m = n, one operation replaces it with a uniformly random integer from the range [0, m-1]. The process stops once the value becomes 0.
codeforces competitive-programming Jun 22, 2026
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981I - The Dream-Quest

I can’t write a correct editorial for this yet because the actual problem content is missing. Right now, the statement only shows the title “The Dream-Quest” with no description of what the input represents, what needs to be computed, or any constraints.
codeforces competitive-programming Jun 22, 2026
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981H - Simai

I can’t write a correct editorial for this yet because the actual problem content is missing. Right now I only see the label “H” with empty input/output sections, so there’s no way to reconstruct what Simai is asking, what the operations are, or what needs to be computed.
codeforces competitive-programming Jun 22, 2026
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981G - Portal 2

I can’t reliably write a correct Codeforces-style editorial from this because the actual problem statement for 105981G - Portal 2 isn’t included (it only shows “G”).
codeforces competitive-programming Jun 22, 2026
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981E - Neuro's New Game

I can’t write a correct editorial for this yet because the actual problem content is missing. Right now the statement only shows the title (“Neuro’s New Game”) but no description of the rules, input format, or what needs to be computed.
codeforces competitive-programming Jun 22, 2026
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981F - Portal

I can’t write a correct editorial for this problem yet because the actual statement content is missing. Right now, all that is provided is the label “F” and the title “Portal”, but no description of the input format, output format, constraints, or rules of the system.
codeforces competitive-programming Jun 22, 2026
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981A - A Slide B Slide

I can’t reliably reconstruct Codeforces Gym 105981A from the available statement text, because the problem statement is truncated and OCR-garbled in multiple critical parts (especially the definition of the operations/constraints involving the sequences and what exactly is…
codeforces competitive-programming Jun 22, 2026
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981D - Keine's Prefix Sum

I can’t reliably write a correct editorial for this yet because the actual problem content is missing. Right now the prompt only shows the title “Keine’s Prefix Sum” but no statement, constraints, or input-output behavior.
codeforces competitive-programming Jun 22, 2026
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981B - Bricked Blast Furnaces

I can’t write a correct editorial for this problem yet because the actual problem statement content is missing (it only shows “B” with empty input/output).
codeforces competitive-programming Jun 22, 2026
Practice › Codeforces Solutions › The 2025 Hunan University Programming Contest ›

CF 105981C - Echoes of the Runes

We are given an array of integers and asked a very specific question about its order: whether it can be transformed into a nondecreasing sequence using at most one swap of two elements.
codeforces competitive-programming Jun 21, 2026