摘要：You are given an undirected graph G(V, E). Each vertex has a mark which is an integer from the range [0..231 – 1]. Different vertexes may have the sam... 阅读全文

摘要：Given a tree with N ( Nb ( inclusive ).2. 2 a b c : change all value in the path a->b ( inclusive ) to c.Inputfirst line consists one interger N.next ... 阅读全文