原题 At the beginning of every day, the first person who signs in the computer room will unlock the door, and the last one

原题 Given a sequence of K integers { N1, N2, …, N**K }. A continuous subsequence is defined to be { N**i, N**i+1, …, N**j

算法简介迪杰斯特拉(Dijkstra)是从一个顶点到其余各顶点的最短路径算法，解决的是有权图中最短路径问题。迪杰斯特拉算法主要特点是从起始点开始，采用贪心算法的策略，每次遍历到始点距离最近且未访问过的顶点的邻接节点，直到扩展到终点为止。

原题 A family hierarchy is usually presented by a pedigree tree. Your job is to count those family members who have no chi

原题 Given a non-negative integer N, your task is to compute the sum of all the digits of N, and output every digit of the

原题 This time, you are supposed to find A+B where A and B are two polynomials. Input Specification:Each input file contai