Solved by heogun

#	Title	# Solved	Avg. Tries
1991	트리 순회	34,846	1.49
2557	Hello World STANDARD	370,724	2.53
10699	오늘 날짜 STANDARD	38,977	1.86
18258	큐 2	32,430	3.02
28278	스택 2	15,259	2.69

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