Problems from Southwestern Europe Regional Contest (SWERC) 2013

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Binary Tree 249 63 25% 0.01 66 46 70% 7.0
Decoding the Hallway 74 38 51% 0.00 38 33 87% 5.5
It Can Be Arranged 177 69 39% 0.03 63 52 83% 5.2
Joe is learning to speak 77 40 52% 0.42 32 28 88% 5.8
Mixing Colours 81 27 33% 1.08 19 12 63% 7.4
Odd and Even Zeroes 247 81 33% 0.00 84 61 73% 5.9
Shopping Malls 619 206 33% 0.00 113 95 84% 3.9
Trending Topic 980 281 29% 0.01 256 200 78% 5.7
VivoParc 1238 323 26% 0.00 275 226 82% 4.5