번호	제목
20027	LCS 8
20028	Min-hashing
20029	Mock Competition Marketing
20030	트리와 쿼리 17
20031	Remote Control
20032	Sewing Graph
20033	Square, Not Rectangle
20034	Steel Slicing 2
20035	이동하기 5
20036	Ball Alignment
20037	Bit String
20038	Broken Tiles
20039	Coronavirus Trend
20040	사이클 게임
20041	Escaping
20042	Hotspots
20043	Negative Cycle
20044	Project Teams
20045	Trading System
20046	Road Reconstruction