摘要：Lazy Running Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 524288/524288 K (Java/Others) Problem Description In HDU, you have to run along the 阅读全文

摘要：E. Minimum spanning tree for each edge time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output C 阅读全文

摘要：E. Paths and Trees time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Little girl Susie acc 阅读全文

摘要：D. Legacy time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output D. Legacy time limit per test 阅读全文

摘要：How Many Maos Does the Guanxi Worth Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 512000/512000 K (Java/Others)Total Submission(s): 2139 Accept 阅读全文

摘要：1579: [Usaco2009 Feb]Revamping Trails 道路升级 Description 每天,农夫John需要经过一些道路去检查牛棚N里面的牛. 农场上有M(1<=M<=50,000)条双向泥土道路,编号为1..M. 道路i连接牛棚P1_i和P2_i (1 <= P1_i <= 阅读全文