题目ID	标题	来源	正确数	通过率
2430-POJ	Lazy Cows	USACO 2005 U S Open Gold	0	----%
2431-POJ	Expedition	USACO 2005 U S Open Gold	0	----%
2432-POJ	Around the world	USACO 2005 U S Open Gold	0	----%
2433-POJ	Landscaping	USACO 2005 U S Open Gold	0	----%