Problems from KTH CSC Popup spring 2013

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Fenwick Tree	0.57	202	2545	2068	81%	3.8Medium	en
Linear Recurrences	0.03	476	314	261	83%	4.8Medium	en
Union-Find	0.04	201	3830	2954	77%	3.4Medium	en