Problems from ICPC SG Preliminary Contest 2015

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
2048	6392	3019	47%	0.00	2911	2481	85%	2.5
Animal Classification	1504	345	23%	0.03	293	193	66%	6.8
Grid MST	1766	361	20%	0.07	375	223	59%	7.2
ICPC Tutorial	4921	1251	25%	0.00	1245	1030	83%	2.8
Panda Chess	1736	369	21%	0.12	350	256	73%	6.0
Pivot	5950	2154	36%	0.00	1706	1395	82%	3.1
Rectangle Land	769	139	18%	0.46	142	91	64%	7.5
Ski	546	91	17%	0.37	120	61	51%	7.6
Triangles	569	87	15%	0.19	132	63	48%	8.3
VisuAlgo Online Quiz	1984	648	33%	0.00	527	453	86%	3.6