Problems from CTU Open 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Ambiguous Result 301 70 23% 0.02 102 65 64% 7.1
Collatz Conjecture 6234 1434 23% 0.00 1215 987 81% 3.7
Domino Tiling 64 23 36% 0.05 24 16 67% 7.3
Intergalactic Mortgage 740 155 21% 0.05 128 92 72% 6.4
Invasion 914 355 39% 0.04 150 121 81% 6.0
Mine the Gradient 64 25 39% 0.11 24 18 75% 7.1
Simple Polygon 427 68 16% 0.23 75 28 37% 8.7
Text Encryption 1087 453 42% 0.00 465 396 85% 3.2