Problems from KTH CSC Popup spring 2013

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Fenwick Tree	0.57	202	2568	2091	81%	3.5Medium	en
Linear Recurrences	0.03	476	315	262	83%	4.7Medium	en
Union-Find	0.04	201	3868	2977	77%	3.5Medium	en