Problems from KTH CSC Popup spring 2013

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Fenwick Tree	0.57	202	2653	2164	82%	3.5Medium	en
Linear Recurrences	0.01	476	339	286	84%	4.5Medium	en
Union-Find	0.04	201	3976	3067	77%	3.3Medium	en