2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛

13 problems from 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 (contest 106290), difficulty -. 4/13 solutions verified against sample I/O.

13 items

2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛

Special | 13 problems | 4/13 verified | Difficulty - | 9m 48s

# Problem Rating Tags Accepted Time ✓
A Hello, Harbin Institute of Technology! 42s ✓
B Bingo! 37s
C \u7ea6\u6570\u6e38\u620f 53s ✓
D \u5c0f\u4e11\u724c 24s
E \u4e0d\u662f\u5c0f\u4e11\u724c 29s
F \u4e8c\u7ef4\u7801\u751f\u6210\u5668 28s
G \u56de\u6587\u4e32\u9b54\u6cd5 34s
H \u8ffd\u5fc6 43s ✓
I \u5b50\u6811 mex 1m 4s ✓
J \u8fc7\u7a0b\u6dd8\u6c70II 33s
K \u9910\u5238\u8bbe\u8ba1 28s
L Jump Jump 27s
M \u95e8\u4e0d\u80fd\u4ece\u8fd9\u4e00\u4fa7\u6253\u5f00 2m 26s
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290D - 小丑牌

I can’t reliably write a correct editorial for this yet because the actual problem content for “Codeforces 106290D - 小丑牌” is missing from your message (the statement section is empty).
codeforces competitive-programming Jun 20, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290B - Bingo!

I can’t reliably write a correct Codeforces-style editorial for “106290B - Bingo!” from the identifier alone, because the actual rules, input format, and required output are missing from your prompt.
codeforces competitive-programming Jun 19, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290J - 过程淘汰II

I can’t write a correct Codeforces-style editorial for this problem because the actual problem content is missing. What you provided only includes the title “过程淘汰II”, but there is no description of the process, input format, constraints, or what is being computed.
codeforces competitive-programming Jun 19, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290K - 餐券设计

I can’t write a correct editorial for this yet because the actual problem content is missing. Right now we only have the title “餐券设计” (voucher/coupon design), but no description of what the input represents, what transformations are required, or what the output…
codeforces competitive-programming Jun 19, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290G - 回文串魔法

I can’t reliably write a correct Codeforces-style editorial for this yet because the actual problem statement is missing from your prompt (the input/output sections are empty, and “回文串魔法” alone isn’t enough to reconstruct the task uniquely).
codeforces competitive-programming Jun 19, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290M - 门不能从这一侧打开

Hmm...something seems to have gone wrong.
codeforces competitive-programming Jun 18, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290I - 子树 mex

We are given a rooted tree where each node carries an integer label. For every node, we are interested in its subtree, meaning the node itself together with all of its descendants in the rooted tree.
codeforces competitive-programming Jun 18, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290L - Jump Jump

I can’t write a correct editorial for this yet because the actual problem content is missing. Right now I only see the title “Jump Jump” with no description of the rules, input format, or what is being computed.
codeforces competitive-programming Jun 18, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290H - 追忆

The provided statement contains only a title and no actual description of the input or output behavior. There is no definition of the objects involved, no constraints, and no transformation that maps input to output.
codeforces competitive-programming Jun 18, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290F - 二维码生成器

I don’t have the actual problem statement for Codeforces 106290F (二维码生成器), only the title. Without the input/output specification and constraints, any attempt to write a full editorial would be guesswork and would very likely invent details that are not part of the…
codeforces competitive-programming Jun 18, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290E - 不是小丑牌

I can’t reliably write a correct editorial for this problem as-is because the actual problem statement is missing from your prompt. Right now I only see the title “不是小丑牌” without any description of the input, output, constraints, or rules of the task.
codeforces competitive-programming Jun 18, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290C - 约数游戏

We are given a two-player deterministic game starting from a pair of positive integers, which we can think of as two piles labeled a and b. Players alternate turns, starting from the first player.
codeforces competitive-programming Jun 18, 2026
Practice › Codeforces Solutions › 2025年第一届哈尔滨工业大学程序设计竞赛一校三区联合校赛 ›

CF 106290A - Hello, Harbin Institute of Technology!

The task is extremely minimal: there is no meaningful structured input to process, and the output is fully determined in advance. The program’s job is to produce a fixed greeting string exactly as required by the problem, regardless of what is read from standard input.
codeforces competitive-programming Jun 18, 2026