摘要:
题目描述 There are nnn towns in Byteotia, connected with only n−1n-1n−1 roads. Each road directly links two towns. All the roads have the same length and 阅读全文
摘要:
题目描述 The king of Byteotia, Byteasar, is returning to his country after a victorious battle. In Byteotia, there are towns connected with only roads. It 阅读全文