题目ID	标题	来源	正确数	通过率
3621-POJ	Sightseeing Cows	USACO 2007 December Gold	0	----%
3622-POJ	Gourmet Grazers	USACO 2007 December Gold	0	----%
3623-POJ	Best Cow Line, Gold	USACO 2007 December Gold	0	----%