Problems from ICPC SG Preliminary Contest 2015

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
2048	8457	3930	46%	0.00	3740	3208	86%	2.1
Animal Classification	1566	355	23%	0.03	308	203	66%	6.8
Grid MST	1911	406	21%	0.07	414	245	59%	7.4
ICPC Tutorial	6198	1564	25%	0.00	1505	1255	83%	2.9
Panda Chess	1804	395	22%	0.12	365	269	74%	6.0
Pivot	7287	2624	36%	0.00	2133	1750	82%	3.3
Rectangle Land	795	150	19%	0.46	152	100	66%	7.4
Ski	551	93	17%	0.37	123	63	51%	7.7
Triangles	593	96	16%	0.19	136	68	50%	8.0
VisuAlgo Online Quiz	2105	708	34%	0.00	574	498	87%	3.5