摘要：Description There are N cities in a country, and there is one and only one simple path between each pair of cities. A merchant has chosen some paths and wants to earn as much money as possible in ... 阅读全文

摘要：http://www.cnblogs.com/keam37/p/3639294.html keam所有 转载请注明出处Problem DescriptionGive you two definitions tree and rooted tree. An undirected connected g... 阅读全文

摘要：http://www.cnblogs.com/keam37/p/3637717.html keam所有 转载请注明出处 Problem Description We can number binary trees using the following scheme: 我们用下面的规则来给一颗二叉树编号： The empty tree is numbered 0.... 阅读全文