摘要： Problem Description Tired of playing computer games, alpc23 is planning to play a game on numbers. Because plus and subtraction is too easy for this g 阅读全文

摘要： Description Given a connected, undirected graph G = (V, E), where V is the vertex set consisting a collection of nodes, and E is the set of edges, eac 阅读全文

摘要： Description Nemo is a naughty boy. One day he went into the deep sea all by himself. Unfortunately, he became lost and couldn't find his way home. The 阅读全文