Интернет-олимпиады, Сезон 2018-2019, Первая личная олимпиада

4 problems from Интернет-олимпиады, Сезон 2018-2019, Первая личная олимпиада (contest 102550), difficulty -. 3/4 solutions verified against sample I/O.

4 items

Интернет-олимпиады, Сезон 2018-2019, Первая личная олимпиада

Special | 4 problems | 3/4 verified | Difficulty - | 15m 48s

#	Problem	Time	✓
A	\u041f\u043e\u0438\u0441\u043a\u0438 \u0422\u0440\u0435\u0437\u0443\u0431\u0446\u0430	3m 48s
B	\u0410\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0435 \u043f\u0430\u0440\u044b	1m 3s	✓
C	\u041c\u0438\u043d\u043d\u043e\u0435 \u043f\u043e\u043b\u0435	3m 38s	✓
D	\u041e\u043f\u0442\u0438\u043c\u0430\u043b\u044c\u043d\u043e\u0435 \u043f\u0435\u0440\u0435\u0441\u0442\u0440\u043e\u0435\u043d\u0438\u0435	7m 19s	✓

Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2018-2019, Первая личная олимпиада ›

CF 102550C - Минное поле

The field is a rectangular grid where every cell initially contains an active mine. During the process, cells are removed one by one. A query asks about the closest remaining mine strictly in one of the four directions from a given cell.

Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2018-2019, Первая личная олимпиада ›

CF 102550B - Атакующие пары

The problem describes a collection of items where each item has a price, and some pairs of items are compatible. We need to find the cheapest set of three items such that every pair among those three items is compatible.

Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2018-2019, Первая личная олимпиада ›

CF 102550A - Поиски Трезубца

The map is an n x m toroidal grid. Moving outside the top, bottom, left, or right edge wraps around to the opposite side. The starting room is the top left corner. Some rooms contain hints marked with X.

Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2018-2019, Первая личная олимпиада ›

CF 102550D - Оптимальное перестроение

We are given a permutation of the numbers from 1 to n. The position of each fish is fixed initially, and the disorder of the line is the number of pairs where a larger strength appears before a smaller strength. One operation chooses a value x.