Solved by bkwak

#	Title	# Solved	Avg. Tries
4963	How Many Islands? STANDARD	25,885	2.02
4969	Monday-Saturday Prime Factors	31	1.19
4991	Cleaning Robot	2,592	3.17
4999	Aaah! STANDARD	12,927	1.59
5014	Elevator Trouble	14,214	2.97
5052	Phone List	9,461	3.26
5073	Triangles	16,716	2.10
5086	Factors And Multiples	33,981	1.58
5236	Longest Decreasing Suffix	87	1.59
5337	Welcome	16,831	1.38
5338	Microsoft Logo	19,191	1.25
5339	Call For Help STANDARD	14,303	1.48
5369	Asteroid Field	32	1.19
5373	Cubing	4,126	2.58
5397	Keylogger	12,152	3.65
5430	Integer Lists STANDARD	24,536	4.95
5522	카드 게임	16,345	1.20
5525	IOIOI	9,574	3.36
5557	1학년	7,427	2.15
5582	공통 부분 문자열	6,244	2.36
5597	Who have not handed in ?	56,878	1.94
5615	아파트 임대 STANDARD	1,252	5.09
5622	BAKA	70,312	1.71
5639	Binary Search Tree	12,747	2.64
5670	Cellphone Typing	2,317	2.96
5719	Almost Shortest Path	3,419	5.13
5921	Escaping the Farm	132	1.87
5977	Mowing the Lawn	346	2.56
6014	Shorter Musical Notes	104	1.33
6030	Scavenger Hunt	614	1.35
6064	Cain Calendar	14,221	3.74
6066	Buying Hay	86	2.08
6087	Laserphones	2,735	4.30
6106	Payback	66	2.47
6208	Cow Roller Coaster	104	2.20
6324	URLs	338	3.94
6497	Dark roads	5,039	2.90
6549	Largest Rectangle in a Histogram	10,023	3.69
6588	Goldbach's Conjecture	11,569	4.56
6597	Tree Recovery	387	1.86
6603	Lotto	24,206	1.80
6785	Alice Through the Looking Glass	22	1.64
7287	Registration STANDARD	58,090	1.92
7453	4 Values whose Sum is 0	5,694	4.42
7469	K-th Number	1,712	3.11
7562	Knight Moves STANDARD	24,643	1.93
7568	덩치	48,502	1.78
7569	토마토 STANDARD	29,153	2.36
7576	토마토 STANDARD	47,970	2.72
7578	공장	3,535	2.59

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