摘要：
Neal is very curious about combinatorial problems, and now here comes a problem about words. Knowing that Ray has a photographic memory and this may not trouble him, Neal gives it to Jiejie.Since Jiejie can't remember numbers clearly, he just uses sticks to help himself. Allowing for Jiejie' 阅读全文
摘要：
Problem HHalumTime Limit : 3 secondsYou are given a directed graph G(V,E) with a set of vertices and edges. Each edge (i,j) that connects some vertex i to vertex j has an integer cost associated with that edge.Define the operation Halum(v, d) to operate on a vertex v using an integer d as follows: s 阅读全文