Интернет-олимпиады, Сезон 2019-2020, Первая личная олимпиада

4 problems from Интернет-олимпиады, Сезон 2019-2020, Первая личная олимпиада (contest 102498), difficulty -. 3/4 solutions verified against sample I/O.

4 items

Интернет-олимпиады, Сезон 2019-2020, Первая личная олимпиада

Special | 4 problems | 3/4 verified | Difficulty - | 23m 19s

# Problem Rating Tags Accepted Time ✓
A \u041f\u0435\u0440\u0435\u0440\u044b\u0432 \u043d\u0430 \u043e\u0431\u0435\u0434 3m 19s ✓
B \u041f\u043e\u0447\u0438\u043d\u043a\u0430 \u043c\u0430\u0441\u0441\u0438\u0432\u0430 7m 11s ✓
C \u041a\u043e\u0434\u043e\u0432\u044b\u0439 \u0437\u0430\u043c\u043e\u043a 11m 30s
D \u041f\u043e\u0431\u0435\u0433 \u0441 \u0433\u043e\u0440\u043d\u043e\u0439 \u0431\u0430\u0437\u044b 1m 19s ✓
Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2019-2020, Первая личная олимпиада ›

CF 102498C - Кодовый замок

The board contains three kinds of cells: empty cells, fixed centers, and rotatable handles. Every handle must be assigned one of two directions.
codeforces competitive-programming Aug 6, 2026
Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2019-2020, Первая личная олимпиада ›

CF 102498D - Побег с горной базы

We have a rooted tree of mountain clearings. Clearing 1 is the root, and every other clearing has exactly one parent that is higher on the mountain.
codeforces competitive-programming Aug 6, 2026
Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2019-2020, Первая личная олимпиада ›

CF 102498B - Починка массива

I’ll provide the editorial as a finished document. The explanation is kept focused on the core idea and implementation details needed to derive the solution.
codeforces competitive-programming Aug 5, 2026
Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2019-2020, Первая личная олимпиада ›

CF 102498A - Перерыв на обед

We have a starting point, a destination point, and several possible restaurants placed on a coordinate plane. The traveler moves at a constant speed of one unit of distance per second and must visit exactly one restaurant before reaching the destination.
codeforces competitive-programming Aug 5, 2026