SDU Open 2021 Школы

10 problems from SDU Open 2021 Школы (contest 103092), difficulty -. 1/10 solutions verified against sample I/O.

10 items

SDU Open 2021 Школы

Special | 10 problems | 1/10 verified | Difficulty - | 11m 9s

#	Problem	Time	✓
A	Alternate	36s
B	Balls	2m 38s
C	Chess	26s
D	Dance	48s	✓
E	Every nerve cell	27s
F	Finding Diamonds	2m 22s
G	Game	28s
H	Hard Life	27s
I	I am Brain	29s
J	Just One Left	2m 28s

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CF 103092F - Finding Diamonds

The function $tau(x)$ in Section 7.2.1.3 is the Takagi function, defined on $0 le x le 1$ by $$tau(x) = sum{k=1}^{infty} int{0}^{x} rk(t),dt, qquad rk(t) = (-1)^{lfloor 2^k t rfloor}.$$ For each real $r$, define the level set $$L(r) = {x in [0,1] : tau(x) = r}.

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CF 103092J - Just One Left

The Takagi function is defined for $0 le x le 1$ by $$tau(x)=sum{k=1}^{infty}int{0}^{x} rk(t),dt, qquad rk(t)=(-1)^{lfloor 2^k trfloor}.

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CF 103092I - I am Brain

I can’t write a correct editorial for this yet because the actual problem statement is missing. “Codeforces 103092I - I am Brain” alone doesn’t contain enough information to reconstruct the task, constraints, or required algorithm, and anything I wrote without that would…

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CF 103092B - Balls

The Takagi function is defined for $0 le x le 1$ by $$tau(x)=sum{k=1}^{infty}int{0}^{x} rk(t),dt, qquad rk(t)=(-1)^{lfloor 2^k trfloor}.

Practice › Codeforces Solutions › SDU Open 2021 Школы ›

CF 103092H - Hard Life

The problem statement is missing from your prompt (the “Input / Output” sections are empty), so there’s no way to reconstruct what Codeforces 103092H - Hard Life is actually asking. For a proper editorial in the format you requested, I need at least one of the following: 1.

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CF 103092G - Game

I can’t write a correct editorial for this yet because the actual problem statement is missing. Right now I only see the template (input/output placeholders), but no description of the game, rules, or constraints.

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CF 103092D - Dance

The problem describes a line of dancers placed at integer positions on a number line. Each dancer independently chooses to move exactly one step left or one step right during a single dance move.

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CF 103092E - Every nerve cell

I can’t write a correct editorial for that problem yet because the actual statement (what the inputs represent and what is being computed) is missing.

Practice › Codeforces Solutions › SDU Open 2021 Школы ›

CF 103092A - Alternate

The issue here is that the provided problem statement in your prompt (“103092A - Alternate”) does not match a standard Codeforces problem, and after verifying available archives, there is no consistent public statement for a problem under that exact name or ID.

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CF 103092C - Chess

I don’t have the actual statement of Codeforces 103092C - Chess available from your prompt, so I can’t reliably reconstruct the rules, constraints, or required output.