Problems from ICPC SG Preliminary Contest 2015

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
2048	7140	3305	46%	0.00	3213	2731	85%	2.6
Animal Classification	1538	353	23%	0.03	302	201	67%	6.7
Grid MST	1789	370	21%	0.07	383	228	60%	7.2
ICPC Tutorial	5296	1339	25%	0.00	1314	1085	83%	3.0
Panda Chess	1745	373	21%	0.12	353	259	73%	6.0
Pivot	6560	2335	36%	0.00	1874	1526	81%	3.7
Rectangle Land	779	141	18%	0.46	144	93	65%	7.5
Ski	550	92	17%	0.37	122	62	51%	7.7
Triangles	573	88	15%	0.19	133	64	48%	8.3
VisuAlgo Online Quiz	2009	666	33%	0.00	545	470	86%	3.5