Solved by concavehull

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

1