Solved by locker50

#	Title	# Solved	Avg. Tries
30017	치즈버거 만들기	1,739	1.50
30019	강의실 예약 시스템	489	1.85
30802	Welcome Kit	9,047	1.87
31403	$A + B - C$	10,648	1.59
31558	Majority Opinion	109	1.88
31559	Cannonball	110	3.05
31560	Balancing Bacteria	66	1.80
33063	Farmer John's Cheese Block	62	2.03

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