Problems from KTH CSC Popup spring 2013

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Fenwick Tree	0.57	202	2696	2203	82%	3.3Medium	en
Linear Recurrences	0.01	476	342	289	85%	4.5Medium	en
Union-Find	0.04	201	4039	3130	77%	2.9Medium	en