Solved by concavehull

#	Title	# Solved	Avg. Tries
31967	오름차순	48	3.21
31966	이진 트리	125	1.58
30392	$K$분 그래프	44	3.05
26858	Stable Planetary System	18	3.61
26855	Not One	28	2.54
26854	Concerto de Pandemic	10	6.60
26851	Bicycle Tour	25	1.60
26850	XOR Pairs	36	1.47
26469	$N-1$ Truths and a Lie	10	3.20
26464	2-LIS	17	2.12
26191	Differences	37	2.76
25061	Antennas	43	1.77

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