Solved by opera_tive

#	Title	# Solved	Avg. Tries
19275	Rectangles	8	2.25
19274	Antennas On Tree	32	1.84
19264	Hung Fu	9	2.33
19260	DotA Quals	8	1.75
19253	Don't Split The Atom!	46	1.39
19250	Flat Earth	65	1.49
19248	Secret Santa	7	1.00
19225	Help BerLine	5	2.60
19224	Game Relics	12	1.33
19223	Foolprüf Security	18	1.72
19219	Balls of Buma	37	1.43
19155	Copying Homework	193	1.46
19154	Kolmogorov	13	1.54
19134	$2x + 2$	199	2.45
19133	Subset Sum	57	2.04
19128	Three Points	40	2.10
19121	Master Zhu and Instability	4	1.25
19118	Master Zhu and Polygons	3	3.00
19117	Master Zhu and Video	2	1.50
19114	Master Zhu and Candies	28	1.89
19100	Shuffle	62	1.44
19093	Ones	21	1.19
19087	Faint	9	1.67
19086	Leave Out All The Rest	6	1.83
19076	Competition	17	1.12
19066	Candies	14	2.21
19056	Oleg and Data Science	9	1.44
19054	Xormites	55	4.40
19028	Link Cut Digraph	59	3.03
19021	Edit	3	3.00
18987	Time Zone	33	4.21
18979	Triangle Partition	47	1.60
18977	Maximum Multiple	45	2.24
18968	Circle Union	21	2.62
18964	Questionnaire	205	1.92
18962	Matching In Multiplication	10	1.60
18939	Observer Game	193	2.17
18933	Exotic Ancient City	9	1.33
18929	Knights of Round Table	63	2.06
18923	Embeddings	16	1.44
18921	Cost Of Subtree	115	1.65
18917	수열과 쿼리 38	1,410	2.73
18884	New Year and Naming	183	1.10
18883	N M 찍기	1,855	2.29
18881	Social Distancing II	304	2.79
18873	Circus	10	2.80
18870	좌표 압축	37,290	2.50
18869	멀티버스 Ⅱ	1,304	2.55
18868	멀티버스 Ⅰ	786	1.71
18856	피드백	641	1.61

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