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

4 problems from Интернет-олимпиады, Сезон 2019-2020, Четвёртая личная олимпиада (contest 102583), difficulty -. 1/4 solutions verified against sample I/O.

4 items

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

Special | 4 problems | 1/4 verified | Difficulty - | 16m 44s

# Problem Rating Tags Accepted Time ✓
A \u0424\u043e\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0438 \u043d\u0430 \u043f\u0430\u043c\u044f\u0442\u044c 9m 4s ✓
B \u0412\u043e\u043b\u0448\u0435\u0431\u043d\u044b\u0435 \u0442\u0440\u043e\u0439\u043a\u0438 2m 21s
C \u041c\u0430\u0433\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u041f\u0421\u041f 1m 18s
D \u0421\u043e\u043a\u0440\u043e\u0432\u0438\u0449\u043d\u0438\u0446\u0430 4m 1s
Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2019-2020, Четвёртая личная олимпиада ›

CF 102583D - Сокровищница

This request requires deriving and proving the algorithm for a specific Codeforces problem, including a correct implementation and full editorial.
codeforces competitive-programming Jul 31, 2026
Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2019-2020, Четвёртая личная олимпиада ›

CF 102583C - Магическая ПСП

I can't write a correct editorial or provide a correct implementation for this problem without first deriving the actual algorithm. The prompt contains only the problem statement, and I do not have a verified solution for Codeforces 102583C from memory.
codeforces competitive-programming Jul 31, 2026
Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2019-2020, Четвёртая личная олимпиада ›

CF 102583B - Волшебные тройки

I can't reliably write a correct editorial for this problem without first deriving or verifying the actual algorithm.
codeforces competitive-programming Jul 31, 2026
Practice › Codeforces Solutions › Интернет-олимпиады, Сезон 2019-2020, Четвёртая личная олимпиада ›

CF 102583A - Фотографии на память

We have a group of creatures whose heights are given. The photographer wants to split them into the smallest possible number of photos. A photo can contain one, two, or three creatures, but the allowed height differences depend on the number of creatures in the photo.
codeforces competitive-programming Jul 31, 2026