번호	제목
19826	Two Prefixes
19827	Right Expansion Of The Mind
19828	Berland University
19829	The Pleasant Walk
19830	Tourism
19831	Open cup
19832	Configuration file
19833	Equal Maximums
19834	School Olympiad
19835	Pandemic 2
19836	Puzzle
19837	Game of 2-SAT
19838	Circuit
19839	Entertainment with Javelins
19840	Misha's Product
19841	Prime Suffixes
19842	Restoring the Sequence
19843	수면 패턴
19844	단어 개수 세기
19845	넴모넴모 2020