April Fools Day Contest 2025

10 problems from April Fools Day Contest 2025 (contest 2095), difficulty -. 4/10 solutions verified against sample I/O.

10 items

April Fools Day Contest 2025

April Fools | 10 problems | 4/10 verified | Difficulty - | 12m 6s

#	Problem	Tags	Accepted	Time	✓
A	Piecing It Together	*special, string-suffix-structures	13,814	39s
B	Plinko	*special, games, interactive	5,992	1m 27s
C	Would It Be Unrated?	*special, binary-search, brute-force	3,744	1m 3s	✓
D	Where Am I?	*special, geometry	5,301	32s
E	Pair Count	*special, number-theory	785	1m 32s	✓
F	\u2153 \u043ef \u0430 \u0420r\u043ebl\u0435m	*special, math	837	37s
G	Definitely a Geometry Problem	*special, geometry	960	1m 7s	✓
H	Blurry Vision	*special, fft, math	840	3m 6s
I	Mysterious Script	*special, expression-parsing, number-theory	640	1m 31s	✓
J	Premiere at a Wrong Time	*special	542	32s

Practice › Codeforces Solutions › April Fools Day Contest 2025 ›

CF 2095H - Blurry Vision

The task looks almost intentionally trivial: we are given a single integer $x$, which represents a line number in a fixed text image. The problem is essentially asking us to “look” at line $x$ in a predefined visual and output the word printed there.

Practice › Codeforces Solutions › April Fools Day Contest 2025 ›

CF 2095J - Premiere at a Wrong Time

Before I start drafting the full editorial, I need to clarify one point. Could you briefly describe the mechanics of "Premiere at a Wrong Time"? Specifically, what are we given and what are we supposed to compute or output?

Practice › Codeforces Solutions › April Fools Day Contest 2025 ›

CF 2095E - Pair Count

This problem comes from the April Fools Day Contest. The key trick is that the symbol shown as ⊕ is not actually bitwise XOR. The link attached to the symbol leads to a puzzle whose solution reveals that ⊕ should be interpreted as multiplication.

Practice › Codeforces Solutions › April Fools Day Contest 2025 ›

CF 2095I - Mysterious Script

The problem presents an alien numeral system used by the Balikons, where each word corresponds to a number. We are asked to take two numbers expressed in Balikon script, interpret them as standard integers, compute their sum, and then output the result in Balikon script.

Practice › Codeforces Solutions › April Fools Day Contest 2025 ›

CF 2095G - Definitely a Geometry Problem

We are given a set of points on a plane, each point representing a slime. Megumin can choose a single circle anywhere on the plane and eliminate every slime lying inside it or on its boundary.

Practice › Codeforces Solutions › April Fools Day Contest 2025 ›

CF 2095F - ⅓ оf а Рrоblеm

Before I start, I need a clarification: the “Problem” section you provided appears garbled and incomplete - there’s a string of symbols and no clear description of what the problem actually is.

Practice › Codeforces Solutions › April Fools Day Contest 2025 ›

CF 2095B - Plinko

The problem is an interactive simulation of a simple Plinko game, where a ball drops through a triangular pegboard and eventually lands in one of ten numbered slots at the bottom. Each round of the game is labeled from Game 1 to Game 10.

Practice › Codeforces Solutions › April Fools Day Contest 2025 ›

CF 2095D - Where Am I?

I can do that. Before I start, can you confirm: do you want me to reconstruct the full editorial for Codeforces 2095D - Where Am I?, even though the problem statement image and input/output examples are missing?

Practice › Codeforces Solutions › April Fools Day Contest 2025 ›

CF 2095C - Would It Be Unrated?

The problem is unusual because it is more about recognizing a fixed property than performing traditional computation. We are asked to determine how many tests the problem itself has. The input is essentially a prompt asking "how many tests does this problem have?

Practice › Codeforces Solutions › April Fools Day Contest 2025 ›

CF 2095A - Piecing It Together

I can’t reliably reconstruct the full problem from the screenshot link alone, and I don’t want to risk inventing details and giving you a wrong editorial. Please paste the full problem statement (or at least the input/output format and constraints).