Solved by plala

#	Title	# Solved	Avg. Tries
18439	LCS 6	313	2.81
18237	행렬 곱셈 순서 3	79	1.61
18236	행렬 곱셈 순서 2	89	2.06
13409	Black and White Boxes	117	3.07
10350	Banks	586	4.61

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