摘要：
D. Fish Graph You are given a simple undirected graph with $n$ nodes and $m$ edges. Note that the graph is not necessarily connected. The nodes are la 阅读全文
摘要：
D. Running Miles There is a street with $n$ sights, with sight number $i$ being $i$ miles from the beginning of the street. Sight number $i$ has beaut 阅读全文