Concurso de programación ANIEI 2023

12 problems from Concurso de programación ANIEI 2023 (contest 104752), difficulty -. 8/12 solutions verified against sample I/O.

12 items

Concurso de programación ANIEI 2023

Special | 12 problems | 8/12 verified | Difficulty - | 14m 31s

# Problem Rating Tags Accepted Time ✓
A Akira 1m 22s ✓
B Beautiful Binary String 1m 14s ✓
C Cut the Magic Triangle 1m 14s ✓
D Determine Palindrome Message 1m 3s ✓
E Exotic island 1m 20s ✓
F Far island treasure 1m 21s
G Game of Coin Stacking 1m 18s
H Happy Face 1m 2s ✓
I Inspecting the Scores 1m 9s
J Juan Jo Hiking Trip 1m 39s
K K Blocked Jawn Path 50s ✓
L Lucia's Treasure 59s ✓
Practice › Codeforces Solutions › Concurso de programación ANIEI 2023 ›

CF 104752I - Inspecting the Scores

Each game consists of a sequence of $N$ matches. The score starts at 1, and every match either multiplies the current score by $A$, multiplies it by $B$, or leaves it unchanged if nobody solves the problem. The key point is that we are not choosing a single sequence.
codeforces competitive-programming Jun 29, 2026
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CF 104752G - Game of Coin Stacking

We are given a sequence of coin stacks, each stack having some initial number of coins. Two players alternate turns and on each turn a player may pick any stack and remove any positive number of coins not exceeding what is currently in that stack.
codeforces competitive-programming Jun 29, 2026
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CF 104752A - Akira

We are given a set of points in the plane, each representing a source of an expanding circular “sphere of light”. Every point starts as a level 1 catastrophe, and its influence grows outward uniformly over time at a fixed rate $M$.
codeforces competitive-programming Jun 29, 2026
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CF 104752D - Determine Palindrome Message

We are given a single string consisting of lowercase Latin characters, but it may also contain digits or other characters in the input format examples, so we treat it as a sequence of symbols.
codeforces competitive-programming Jun 29, 2026
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CF 104752L - Lucia's Treasure

We are given a single positive integer $X$, and we are asked to construct a number that satisfies two conditions at the same time. First, it must be divisible by $X$. Second, it must be a perfect square, meaning its prime factorization has all exponents even.
codeforces competitive-programming Jun 28, 2026
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CF 104752J - Juan Jo Hiking Trip

We are given a small group of people, each carrying a backpack with a fixed weight limit, and a collection of provisions, each with its own weight.
codeforces competitive-programming Jun 28, 2026
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CF 104752K - K Blocked Jawn Path

We are given a graph-like layout where movement is allowed along connections between positions, but some positions are marked as blocked. A move through a normal position is always allowed, while stepping onto a blocked position consumes one unit of a limited budget $K$.
codeforces competitive-programming Jun 28, 2026
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CF 104752H - Happy Face

We are given a turn-based game played over several independent scenarios. Each scenario consists of a collection of balloon bundles, where each bundle contains some number of balloons.
codeforces competitive-programming Jun 28, 2026
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CF 104752F - Far island treasure

We are working with an extremely large conceptual array indexed from 1 to 10^9, initially filled with zeros. Instead of ever materializing this array, we receive a sequence of operations, each operation increasing every position in a closed interval by a fixed value.
codeforces competitive-programming Jun 28, 2026
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CF 104752E - Exotic island

The shop has a single fixed bill denomination, and every item has a price in dollars. A tourist wants to pay for an item, but Juan can only use bills of that one denomination.
codeforces competitive-programming Jun 28, 2026
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CF 104752C - Cut the Magic Triangle

We are given an $N times N$ grid where each cell contains either a large positive value or $-1$, which marks a blocked or unusable cell. The task is to select a downward-pointing triangular region inside this grid.
codeforces competitive-programming Jun 28, 2026
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CF 104752B - Beautiful Binary String

We are trying to build a binary string, but we do not get to freely choose its structure without limits. We are given a supply of zeros and ones, and we are also told that runs of identical characters are capped in length.
codeforces competitive-programming Jun 28, 2026