摘要:
问题描述 We have a graph with N vertices, numbered 0 through N−1. Edges are yet to be added. We will process Q queries to add edges. In the i-th (1≦i≦Q) q 阅读全文
摘要:
问题描述 There is an easy way to obtain a new task from an old one called "Inverse the problem": we give an output of the original task, and ask to genera 阅读全文
摘要:
问题描述 Urpal lives in a big city. He has planned to meet his lover tonight. The city has n junctions numbered from 1 to n. The junctions are connected b 阅读全文