Solved by xiaowuc1

#	Title	# Solved	Avg. Tries
6508	A Game with Marbles	89	1.42
6509	Help Bob	6	1.50
6510	Annoying painting tool	18	1.39
6511	Black and white painting	58	1.71
6512	Cylinder	6	1.00
6513	Deli Deli	64	1.27
6514	Expressions	10	1.30
6515	Frequent values	369	3.67
6516	Grocery store	20	3.30
6517	Halloween treats	7	2.57
6518	Automatic Correction of Misspellings	25	3.00
6523	Flavius Josephus Reloaded	103	2.41
6525	Homogeneous squares	44	2.27
6526	Ambiguous permutations	57	1.14
6527	Bullshit Bingo	45	2.64
6528	106 miles to Chicago	40	1.23
6531	Any fool can do it	70	2.54
6534	All Discs Considered	9	1.89
6535	Boolean Logic	11	1.73
6537	In Danger	29	1.48
6538	Run Length Encoding	30	5.80
6541	Binary Search Heap Construction	13	3.69
6542	Assistance Required	30	2.63
6543	The Bottom of a Graph	639	1.87
6545	Drink, on Ice	28	1.75
6546	Edge	44	2.00
6549	Largest Rectangle in a Histogram	11,104	3.63
6550	All in All	2,406	2.54
6553	Diplomatic License	40	1.70
6554	Polygon Programming with Ease	14	1.93
6555	The Sierpinski Fractal	24	2.79
6556	Paths on a Grid	47	3.98
6558	Average is not Fast Enough!	44	2.20
6560	Code the Tree	16	3.25
6562	Etaoin Shrdlu	20	1.60
6564	Global Roaming	6	5.00
6565	Hard to Believe, but True!	165	1.38
6566	Anagram Groups	147	5.73
6567	Let it Bead	99	1.18
6568	Simple Computers	304	4.64
6569	Mondriaan's Dream	225	2.15
6571	How many Fibs?	673	3.48
6573	Hike on a Graph	9	1.56
6574	Advanced Fruits	59	1.81
6575	Bee Maja	10	1.80
6576	Quad Tree	86	2.87
6577	From Dusk till Dawn (or Vladimir the Vampire)	16	4.63
6579	Friends	29	2.24
6580	Quad Tree	75	2.99
6581	HTML	415	4.69

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