Problems from KTH CSC Popup spring 2013

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Fenwick Tree 7861 2066 26% 0.67 1192 912 77% 4.3
Linear Recurrences 903 393 44% 0.06 147 126 86% 4.5
Union-Find 12837 4069 32% 0.04 1823 1361 75% 5.0