번호	제목
19281	Short Random Problem
19282	Block, Stock and Two Smoking Galaxy Notes
19283	Lunch Queue
19284	Oneness
19285	Shuffle
19286	Piecewise Linearity
19287	Sketch
19288	≤ or ≥
19289	Stairways
19290	Hiding a Tree
19291	Donut-shaped Enclosure
19292	hi
19293	Earthquake
19294	Dynamic Input Tool
19295	Central Lake
19296	Computing MDSST
19297	Logistical Metropolis
19298	Number of Cycles
19299	New Occurrences
19300	Game of Sorting