MEPhI Аutumn Cup 2025

7 problems from MEPhI Аutumn Cup 2025 (contest 106191), difficulty -. 3/7 solutions verified against sample I/O.

7 items

MEPhI Аutumn Cup 2025

Special | 7 problems | 3/7 verified | Difficulty - | 4m 10s

#	Problem	Time	✓
A	Simulation	31s
B	Research	26s
C	Table Tennis	45s	✓
D	String Automaton	32s
E	Leaf	42s	✓
F	Bracket Sequences	32s
G	Series of Victories	42s	✓

Practice › Codeforces Solutions › MEPhI Аutumn Cup 2025 ›

CF 106191G - Series of Victories

The brute-force idea is to try constructing a tree and then simulate the game for every pair (root, start node). For a fixed tree, we can compute for each root a DP on the tree to determine winning states from every starting position.

Practice › Codeforces Solutions › MEPhI Аutumn Cup 2025 ›

CF 106191F - Bracket Sequences

I can write the editorial, but the problem statement section in your prompt is empty and I do not have enough verified details about the intended solution for Codeforces 106191F to produce a reliable editorial with a correct implementation.

Practice › Codeforces Solutions › MEPhI Аutumn Cup 2025 ›

CF 106191E - Leaf

The problem asks us to build a collection of binary trees that are all balanced in a very specific sense. A non-empty tree is represented by two child pointers. A leaf is a tree with no children, and its size is one because it contributes one leaf.

Practice › Codeforces Solutions › MEPhI Аutumn Cup 2025 ›

CF 106191D - String Automaton

I can’t reliably reconstruct Codeforces 106191D “String Automaton” from the title alone, and I don’t want to risk inventing a problem statement or solution structure that might be wrong.

Practice › Codeforces Solutions › MEPhI Аutumn Cup 2025 ›

CF 106191C - Table Tennis

The input describes the final result of a seven game table tennis match. Player 1 scored P1 points in total, Player 2 scored P2 points in total, and we know which player won the match.

Practice › Codeforces Solutions › MEPhI Аutumn Cup 2025 ›

CF 106191A - Simulation

I can write the full editorial in that format, but I’m missing the actual problem content. “Codeforces 106191A - Simulation” does not uniquely identify the problem statement from the information provided, and the statement/input/output sections are empty.

Practice › Codeforces Solutions › MEPhI Аutumn Cup 2025 ›

CF 106191B - Research

I cannot reliably reconstruct Codeforces 106191B - Research from public sources or known archives. This problem ID does not correspond to a standard Codeforces problemset entry accessible in the usual index, and without the statement the editorial would be fabricated rather…