The 2026 ICPC Latin America Championship

12 problems from The 2026 ICPC Latin America Championship (contest 106416), difficulty -. 11/12 solutions verified against sample I/O.

12 items

The 2026 ICPC Latin America Championship

ICPC/IOI | 12 problems | 11/12 verified | Difficulty - | 19m 8s

#	Problem	Time	✓
A	Ants on a Ring	1m 11s	✓
B	Booksort	1m 4s	✓
C	Crop Circles	52s	✓
D	Dropshipping	52s	✓
E	Eye Exam	8m 25s
F	Fun with Balls	58s	✓
G	GATA-CAT	56s	✓
H	Holes and Tunnels	1m 16s	✓
I	Inversion Game	49s	✓
J	Jaime's Palace	43s	✓
K	Kitten Greetings	53s	✓
L	Late and Disobedient	1m 9s	✓

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416L - Late and Disobedient

We are watching a one-dimensional crosswalk of length $L$, represented as the segment from $0$ to $L$. At any moment in time, each pedestrian is a moving point on the real line, starting at position $Xi$ and moving with constant velocity $Vi$, so their position at time $T$ is…

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416G - GATA-CAT

We are asked to construct a short DNA-like string over the alphabet {C, G, A, T}. Each query gives two target values: the number of subsequences equal to C-A-T (CAT degree) and the number of subsequences equal to G-A-T-A (GATA degree), where subsequences preserve order but may…

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416E - Eye Exam

Codeforces 106416E: Eye Exam

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416I - Inversion Game

We are given a multiset of integers. Two players alternately take elements from this multiset and append each chosen element to the end of a growing sequence.

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416C - Crop Circles

We are given a set of circular irrigation sources on a plane. Each source has a fixed position and a fixed watering radius, and it fully covers everything inside or on its circle. Camila wants to place another circle anywhere in the plane.

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416J - Jaime's Palace

We are given a system that repeatedly manipulates a stack of plates. There are P distinct plates, initially arranged in a stack. Over D days, each day specifies a number Ki.

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416D - Dropshipping

We are given a sequence of purchase requests, each associated with a cost. Every request must be satisfied exactly once, and satisfying a request corresponds to making one purchase of that item at its full listed price.

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416H - Holes and Tunnels

We are given a tree with $N$ nodes. Each node represents a hole, and each edge is a tunnel. A move in the game is any simple path between two nodes. Since the graph is a tree, every pair of nodes defines exactly one such path. Two players independently pick two paths $A$ and $B$.

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416A - Ants on a Ring

We are given a circular track with positions labeled from 1 to L, where position L wraps around to position 1. Several ants start on distinct positions and each ant has a distinct target position. Time proceeds in discrete seconds.

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416K - Kitten Greetings

We are given N points in the plane, each representing a cat at integer coordinates. A “circuit” is not a simple path but a very specific motion process: Catarina starts at some point with an initial direction, and repeatedly performs a move consisting of a forward walk, a…

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416F - Fun with Balls

We are given a sequence of colored balls that are inserted one by one into a growing structure. Each ball must end up in a stable pile where every ball is either placed on the ground or supported by exactly two balls directly below it.

Practice › Codeforces Solutions › The 2026 ICPC Latin America Championship ›

CF 106416B - Booksort

We are given a row of stacks, each stack containing some number of books. The goal is not to move books individually but to apply a special operation on two chosen stacks.