번호	제목
20228	Keima
20229	Evacuation Site
20230	Avoiding Three Cs
20231	Idealistic Canister
20232	Archivist
20233	Bicycle
20234	Corrupted Sort
20235	Display
20236	Easy Compare-and-Set
20237	Futures Market Trends
20238	Grammar Path
20239	Heroes of Coin Flipping
20240	Integer Square
20241	Joint Password Storage
20242	Keys and Locks Boolean Logic
20243	Lost Permutation
20244	Mind the Gap
20245	Nunchucks Shop
20246	Pac-Man
20247	Folding