번호	제목
19806	Blocking the View
19807	Fermat's Last Theorem
19808	Guess the Path
19809	Hide-and-Seek for Robots
19810	Isosceles triangles
19811	Too Many Hyphens
19812	Planet Nine
19813	Dates
19814	Factory
19815	RotationAlmostSort
19816	Time Travel
19817	Company Merging
19818	LaTeX Expert
19819	New Year Presents
19820	Similar Arrays
19821	Horseback Riding
19822	How to Learn You Score
19823	Combostone
19824	Linearization
19825	Minimal Product