Solved by sshs_junhongkim

#	Title	# Solved	Avg. Tries
27323	직사각형	23,493	1.15
27331	2 桁の整数 (Two-digit Integer)	2,642	1.10
27433	팩토리얼 2	16,641	2.09
27434	팩토리얼 3	3,452	2.12
27866	문자와 문자열 STANDARD	59,315	1.48
27907	The primes contain arbitrarily long arithmetic progressions	445	2.80

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