This is an unofficial mirror contest for the China National Olympiad in Informatics, 2016, day 2.

There will be 3 problems to solve in 4 hours, under full feedback. This contest is not rated.

This is intended as warmup for the (as-official-as-rules-allow-it) mirror of the 2022 China National Olympiad in Informatics. However, due to copyright issues, that mirror will be pay-walled. If you are interested in participating, please contact rpeng in rpeng-rants on the DMOJ Discord for details.

For pacing purposes, cutoff for the 2016-2017 Chinese Training Team (top 50) was 414/600