题目ID	标题	来源	正确数	通过率
1307-POJ	Mapping the Route	North Central North America 1997	0	----%
1308-POJ	Is It A Tree?	North Central North America 1997	0	----%
1309-POJ	Coconuts, Revisited	North Central North America 1997	0	----%
1310-POJ	Nonstop Travel	North Central North America 1997	0	----%
1311-POJ	Doing Windows	North Central North America 1997	0	----%
1312-POJ	Numerically Speaking	North Central North America 1997	0	----%