On last saturday, ACM ICPC 2017 Brazil Sub-Regionals contest was held, featuring 13 problems and having more than 800 teams trying to advance to the Latin America Regional Finals that will happen in November. I created this thread so we can talk about the problems in the contest.

The problems can be viewed in this link (Portuguese): http://maratona.ime.usp.br/prim-fase17/maratona.pdf

This problems are in URI too: https://www.urionlinejudge.com.br/judge/pt/problems/origin/148

A — SegTree

B — Simulation with dp

C — LCM

D — Prime divisors

E — Simulation

F — Simple sort

G — Dp

H — Max path on dag

I — DFS/BFS

J — %3

K — I dont know

L — I dont know

M — monkey problem

Anyone know how to solve problems L and K?