Solved by concavehull

#	Title	# Solved	Avg. Tries
31967	오름차순	56	3.13
31966	이진 트리	133	1.63
30392	$K$분 그래프	48	3.10
26858	Stable Planetary System	21	3.48
26855	Not One	35	2.37
26854	Concerto de Pandemic	11	6.36
26851	Bicycle Tour	29	1.72
26850	XOR Pairs	42	1.40
26469	$N-1$ Truths and a Lie	10	3.20
26464	2-LIS	17	2.12
26191	Differences	39	2.67
25061	Antennas	44	1.75

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