Solved by java_study

#	Title	# Solved	Avg. Tries
32370	Rook	205	2.70
27866	문자와 문자열 STANDARD	57,328	1.48
2743	단어 길이 재기 STANDARD	68,855	1.25
2557	Hello World STANDARD	355,544	2.54
1001	A-B STANDARD	276,389	1.44
1000	A+B STANDARD	321,744	2.59

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