Solved by neoxenesis

#	Title	# Solved	Avg. Tries
16562	친구비	4,069	2.38
17386	선분 교차 1	3,776	2.74
17509	And the Winner Is... Ourselves!	811	1.14
18258	큐 2	28,833	3.06
19577	수학은 재밌어	536	2.96

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