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Profile of extraterrestrial
extraterrestrial
Solved problems
JOI17_coach
JOI17_long_mansion
JOI18_asceticism
JOI18_worst_reporter3
JOI18_airline
JOI18_bitaro
JOI18_candies
JOI18_library
JOI19_examination
JOI19_meetings
APIO19_strange_device
JOI20_sweeping
JOI20_chameleon
JOI20_constellation3
Submitted but unsolved problems
JOI17_arranging_tickets
APIO18_new_home
APIO18_circle_selection
APIO18_duathlon