Problems from IDI Open 2015

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
A Feast For Cats	2784	1049	38%	0.00	730	626	86%	3.8
Blackboard Numbers	2145	558	26%	0.00	398	319	80%	4.8
Cat And Mouse	638	115	18%	0.00	144	72	50%	7.7
Friday the 13th	2658	1372	52%	0.00	1331	1238	93%	1.9
Help Roomba Find Himself	137	50	36%	0.01	65	48	74%	5.7
I Hate The Number Nine	2288	907	40%	0.00	861	733	85%	3.6
NTNU Orienteering	1032	250	24%	0.05	168	148	88%	4.5
Simon Says	7454	2594	35%	0.00	2673	2357	88%	2.3
Smart Phone	850	403	47%	0.00	417	375	90%	2.6
Sneaky Snowninjas	279	53	19%	0.24	49	24	49%	8.7