번호	제목
21056	Joining Flows
21057	Keep Calm And Carry Off
21058	Language Survey
21059	Methodic Multiplication
21060	Adjacent Rooks
21061	Beautiful Permutation
21062	Cartesian MST
21063	Display of Springs
21064	Even Intervals
21065	Friendship Circles
21066	Game on a Tree
21067	Hackerman
21068	Interesting Scoring Systems
21069	Joyful Numbers
21070	Königsberg Bridges
21071	Long Grid Covering
21072	Color
21073	Final Exam
21074	Travel around China
21075	Minimal Cut