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?