번호	제목
21236	Comfortable Cows
21237	Clockwise Fence
21238	Absenteeism
21239	Fakes and Shidget
21240	Cyclically Shifted Maze
21241	Two Pirates - 2
21242	Powerless Mage
21243	Exactly One Point
21244	Lexicographically Minimal Subsequence
21245	Video Reviews - 2
21246	Chess Tournament
21247	Lost Island
21248	Bloodseeker
21249	Not the Longest Increasing Subsequence
21250	Binary Search Tree
21251	Premove Checkmate
21252	Ah, It's Yesterday Once More
21253	Baby's First Suffix Array Problem
21254	Certain Scientific Railgun
21255	Degree of Spanning Tree