Problems from KTH CSC Popup spring 2013

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Fenwick Tree	0.57	202	2617	2129	81%	3.6Medium	en
Linear Recurrences	0.01	476	318	264	83%	4.7Medium	en
Union-Find	0.04	201	3933	3029	77%	3.4Medium	en