摘要：
World ExhibitionTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 568Accepted Submission(s): 264Problem DescriptionNowadays, many people want to go to Shanghai to visit the World Exhibition. So there are always a lot of people who are standing along 阅读全文
