번호	제목
20576	Neural Networks
20577	Raid
20578	Broken line
20579	Territories
20580	Tea
20581	Three balls
20582	Family photo
20583	Pop music
20584	Island
20585	Goldfish and pikes
20586	Tokens
20587	Even rain
20588	Floyd-Warshall
20589	Abstract Circular Cover
20590	Biggest Set Ever
20591	Convex Sets On Graph
20592	Delete Two Vertices Again
20593	Easy One
20594	Football
20595	Game On Board