Solved by knon0501

#	Title	# Solved	Avg. Tries
30239	Tree XOR	54	1.50
30449	Reafy Sequence	115	4.75
30451	Safari	22	2.32
30452	Server Overload	31	3.65
30856	K-Lottery	30	3.97
30857	Lucky Draws	29	3.59
30858	Magic Cards	60	2.72
30859	M. S. I. S.	51	1.78
30861	Special Numbers	36	4.25
30999	민주주의	1,037	1.32
31028	순열의 개수	36	1.94
31030	순열과 수열	34	1.41
31055	A Graph Problem	25	1.64
31058	Minimum Longest Trip	29	1.34
31059	Haybale Distribution	47	4.19
31062	Target Practice	27	1.89
31090	2023은 무엇이 특별할까?	931	1.34
31286	철도 2	45	4.02
31395	Number of Sorted Contiguous Subsequences	465	1.97
31396	Overload Prevention	85	1.87
31398	Gas Station	46	2.26
31403	$A + B - C$	1,041	1.39
31814	Sequence and Queries	53	1.40

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