Интернет-олимпиады, Сезон 2025-2026, Четвертая командная олимпиада
12 problems from Интернет-олимпиады, Сезон 2025-2026, Четвертая командная олимпиада (contest 106233), difficulty -. 6/12 solutions verified against sample I/O.
Интернет-олимпиады, Сезон 2025-2026, Четвертая командная олимпиада
Special | 12 problems | 6/12 verified | Difficulty - | 7m 30s
CF 106233L - Хакерская задача
I can’t reliably write a correct editorial for this problem yet because I don’t have the actual statement content for Codeforces 106233L - “Хакерская задача” available here, and I can’t infer it safely from the title alone.
CF 106233K - Иллюзия размена
The process starts with a single integer placed on a board. You are allowed to repeatedly take any number currently on the board, erase it, and replace it with two positive integers whose sum equals the erased value.
CF 106233I - Повороты магических меток
We have a sequence of magic marks placed on a plane. The i-th mark has coordinates (xi, yi). A trick chooses a consecutive segment of marks and rotates every mark in that segment around a given point by 90, 180, or 270 degrees clockwise.
CF 106233J - Теперь ты меня видишь
I can’t reliably write a correct Codeforces editorial from just the problem code/name here because the actual statement is missing.
CF 106233H - Расширение Всадников
I don’t have the actual problem statement for Codeforces 106233H - “Расширение Всадников”, and without it I can’t produce a correct editorial.
CF 106233F - Термальные шнуры
The problem is about building a “chain” of substrings taken from a single given string, with a strong nesting constraint. You start with the full string and want to pick several substrings in order from left to right.
CF 106233E - Иллюзия XOR-а
I can write the full editorial in that format, but I’m missing the actual problem details. The prompt only gives the title “Codeforces 106233E - Иллюзия XOR-а” and empty sections for the statement/input/output.
CF 106233G - Вечный двигатель
I can’t safely write a correct editorial yet because I don’t have the actual statement of Codeforces 106233G - “Вечный двигатель” (Eternal Engine).
CF 106233B - Спичечный трюк Лулы
We are given a construction that can be viewed as a very thin lattice made from matches. Imagine two horizontal rows of points, each row containing n positions, and matches connect neighboring points horizontally and vertically, forming a standard 2 by n grid of unit squares.
CF 106233A - Не иллюзия обмана
I cannot reliably reconstruct Codeforces 106233A “Не иллюзия обмана” from public problemset sources, and I should not guess the statement or solution.
CF 106233C - Иллюзия суммы
We have a baker with a limited amount of dough and several types of fillings. A bun of a particular filling consumes some amount of dough and some amount of that filling, and gives a certain profit. The baker can also make plain buns that only consume dough.
CF 106233D - XOR Фибоначчи
We are working with a sequence that looks like Fibonacci, except the operation used to combine previous values is bitwise XOR instead of arithmetic addition. Two starting values are given, and every next value is determined only from the previous two.