Problems from CTU Open 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Ambiguous Result 265 57 22% 0.02 88 54 61% 8.1
Collatz Conjecture 4987 1105 22% 0.00 963 775 80% 3.6
Domino Tiling 43 19 44% 0.05 19 14 74% 7.9
Intergalactic Mortgage 429 81 19% 0.08 79 51 65% 8.2
Invasion 589 200 34% 0.04 69 61 88% 3.5
Mine the Gradient 43 15 35% 0.33 18 14 78% 6.6
Simple Polygon 337 54 16% 0.23 61 22 36% 8.8
Text Encryption 843 358 42% 0.00 364 308 85% 3.2