摘要：
Given a directed graph G, con- sider the following transformation. First, create a new graph T(G) to have the same vertex set as G. Cre- ate a directe 阅读全文
摘要：
Every cow's dream is to become the most popular cow in the herd. In a herd of N (1 <= N <= 10,000) cows, you are given up to M (1 <= M <= 50,000) orde 阅读全文