Problems from ICPC SG Preliminary Contest 2015

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
2048	5397	2573	48%	0.00	2447	2101	86%	2.1
Animal Classification	1257	264	21%	0.03	254	159	63%	6.9
Grid MST	1709	340	20%	0.07	355	206	58%	7.0
ICPC Tutorial	4450	1139	26%	0.00	1145	937	82%	2.9
Panda Chess	1678	356	21%	0.12	335	243	73%	6.1
Pivot	5125	1859	36%	0.00	1478	1195	81%	3.0
Rectangle Land	754	139	18%	0.46	140	91	65%	7.0
Ski	545	91	17%	0.37	119	61	51%	7.3
Triangles	552	83	15%	0.19	129	61	47%	8.7
VisuAlgo Online Quiz	1917	616	32%	0.00	503	430	85%	3.7