Problems from ICPC SG Preliminary Contest 2015

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
2048	3015	1531	51%	0.00	1476	1267	86%	2.2
Animal Classification	999	192	19%	0.04	194	124	64%	6.7
Grid MST	1371	238	17%	0.13	266	153	58%	7.0
ICPC Tutorial	3081	785	25%	0.00	810	666	82%	3.1
Panda Chess	1260	271	22%	0.19	252	191	76%	5.9
Pivot	2545	857	34%	0.00	838	658	79%	3.3
Rectangle Land	609	101	17%	0.73	101	68	67%	6.8
Ski	461	68	15%	0.49	94	47	50%	8.8
Triangles	454	62	14%	0.20	98	51	52%	8.5
VisuAlgo Online Quiz	1305	403	31%	0.01	350	295	84%	4.0