摘要： ---恢复内容开始---Surround the TreesTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 166 Accepted Submission(s): 81 Problem Description There are a lot of trees in an area. A peasant wants to buy a rope to surround all these trees. So at... 阅读全文