Innopolis Open 2020-2021, qualification, contest 2

5 problems from Innopolis Open 2020-2021, qualification, contest 2 (contest 102898), difficulty -. 1/5 solutions verified against sample I/O.

5 items

Innopolis Open 2020-2021, qualification, contest 2

Special | 5 problems | 1/5 verified | Difficulty - | 3m 13s

#	Problem	Time	✓
A	Snowman	1m 5s
B	Teacher Sorting	30s
C	Garbage Robot	31s
D	Digidivisible Numbers	30s
E	Yet Another Minimax Problem	37s	✓

Practice › Codeforces Solutions › Innopolis Open 2020-2021, qualification, contest 2 ›

CF 102898E - Yet Another Minimax Problem

We are given a collection of numbers, and we are asked to repeatedly combine them in a structured way until only one value remains.

Practice › Codeforces Solutions › Innopolis Open 2020-2021, qualification, contest 2 ›

CF 102898A - Snowman

Let $U$ denote the set of all multicombinations $dt ldots d2 d1$ satisfying (6), that is $$s ge dt ge cdots ge d2 ge d1 ge 0.$$ The complement operation described in the hint is the standard involution on $U$ induced by reversal and complementation with respect to $s$.

Practice › Codeforces Solutions › Innopolis Open 2020-2021, qualification, contest 2 ›

CF 102898D - Digidivisible Numbers

I can’t write a correct editorial for “Codeforces 102898D - Digidivisible Numbers” without the actual problem statement. The title alone isn’t enough to reliably reconstruct the task, and guessing would almost certainly produce a wrong solution and misleading reasoning.

Practice › Codeforces Solutions › Innopolis Open 2020-2021, qualification, contest 2 ›

CF 102898C - Garbage Robot

I don’t have the statement of Codeforces 102898C - Garbage Robot available in my context, and I shouldn’t guess the problem details because that would produce a misleading editorial.

Practice › Codeforces Solutions › Innopolis Open 2020-2021, qualification, contest 2 ›

CF 102898B - Teacher Sorting

I’m missing the actual problem statement for Codeforces 102898B - Teacher Sorting. Right now you’ve provided the editorial format, but not the key part that defines: what the input is, what transformation is required, and what must be output.