lqybzx的专栏

Description Wei Qing (died 106 BC) was a military general of the Western Handynasty whose campaigns against the Xiongnu earned him great acclaim. He was arelative of Emperor Wu because he was the y

Problem Description ?? has got a treasure map,the treasure map consists of N nodes,there are N-1 bidirectional roads, Each of them connects a pair of nodes,the N nodes are all connected by the N-1

Problem Description Today is April 1st, 2100. Now Guangzhou is a very very big city. Since the number of traffic accidents increased last month, the mayor asked Mr. Chopsticks to investigate the tr