Problems from CTU Open 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Ambiguous Result 269 59 22% 0.02 90 56 62% 7.8
Collatz Conjecture 5229 1158 22% 0.00 1015 817 80% 3.8
Domino Tiling 47 19 40% 0.05 21 14 67% 7.9
Intergalactic Mortgage 447 85 19% 0.08 85 54 64% 8.0
Invasion 716 289 40% 0.04 83 70 84% 4.7
Mine the Gradient 45 15 33% 0.33 19 14 74% 6.6
Simple Polygon 368 55 15% 0.23 65 23 35% 8.9
Text Encryption 895 375 42% 0.00 380 322 85% 3.2