Problems from KTH CSC Popup spring 2013

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Fenwick Tree 9395 2529 27% 0.61 1448 1129 78% 4.4
Linear Recurrences 964 419 43% 0.06 168 143 85% 5.0
Union-Find 15924 4894 31% 0.04 2251 1676 74% 5.1