2025-2026 Всероссийская олимпиада школьников по информатике, региональный этап, 2 тур
4 problems from 2025-2026 Всероссийская олимпиада школьников по информатике, региональный этап, 2 тур (contest 106338), difficulty -. 4/4 solutions verified against sample I/O.
2025-2026 Всероссийская олимпиада школьников по информатике, региональный этап, 2 тур
Special | 4 problems | 4/4 verified | Difficulty - | 3m 26s
CF 106338A - Покраска бруска
We are given a rectangular solid block made of unit cubes with dimensions $a times b times c$. Every unit cube inside this block has some number of faces exposed on the outside surface, depending on where it sits: corner, edge, face, or fully interior.
CF 106338B - Битовая магия
We are working with a bit constraint on integers and need to count how many numbers in a range satisfy a fixed bitwise condition. The condition is that a number $x$ is valid if every bit that is set in a given mask $b$ is also set in $x$.
CF 106338D - XOR Раскраска
We are given two arrays, which we can think of as two sets of integers, A and B. From these two sets we implicitly define a compatibility rule between elements of A.
CF 106338C - Скользящие окна
We are given an array and a set of queries. Each query describes a window size and asks about sliding that window across the array. For every position of the window, we take the minimum value inside it, and then we aggregate these minima over a range of window positions.