Problems from CTU Open 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Ambiguous Result 296 66 22% 0.02 97 61 63% 7.1
Collatz Conjecture 5936 1332 22% 0.00 1132 917 81% 3.7
Domino Tiling 63 22 35% 0.05 23 15 65% 7.9
Intergalactic Mortgage 594 124 21% 0.08 108 76 70% 6.2
Invasion 871 331 38% 0.04 127 102 80% 5.8
Mine the Gradient 61 23 38% 0.11 21 16 76% 6.5
Simple Polygon 414 65 16% 0.23 72 27 38% 8.6
Text Encryption 1013 424 42% 0.00 435 369 85% 3.2