Strive

DescriptionSeveral currency exchange points are working in our city. Let us suppose that each point specializes in two particular currencies and performs exchange operations only with these curren

DescriptionOne cow from each of N farms (1 ≤ N ≤ 1000) conveniently numbered 1..N is going to attend the big cow party to be held at farm #X (1 ≤ X ≤ N). A total of M (1 ≤ M ≤ 100,000) unidirect

DescriptionBackground Hugo Heavy is happy. After the breakdown of the Cargolifter project he can now expand business. But he needs a clever man who tells him whether there really is a way from t

DescriptionN (1 ≤ N ≤ 100) cows, conveniently numbered 1..N, are participating in a programming contest. As we all know, some cows code better than others. Each cow has a certain constant skill

DescriptionBIT has recently taken delivery of their new supercomputer, a 32 processor Apollo Odyssey distributed shared memory machine with a hierarchical communication subsystem. Valentine McKee'

DescriptionWhile exploring his many farms, Farmer John has discovered a number of amazing wormholes. A wormhole is very peculiar because it is a one-way path that delivers you to its destination

DescriptionArbitrage is the use of discrepancies in currency exchange rates to transform one unit of a currency into more than one unit of the same currency. For example, suppose that 1 US Dollar

题目大意：s会分裂，然后从s到A的最小的步是多少。解题思路：先bfs算出A或者S到任何点的距离，然后最求最小生成树，用dij或者prim都可以#include#include#include#include#includeusing namespace std;const int maxn = 100+10;char mp[maxn][maxn];int c

题目大意：给你一个无向图，问如果这个无向图的最小生成树是唯一的就输出最小生成树的权值，否则输出Not Unique!解题思路，求次小生成树，如果次小生成树中有何最小的权值一样的，则生成树不唯一，否则唯一用Kruskal，求最小生成树，然后枚举其中一个边去掉以后（n-1条），再求最小生成树，然后和原来的权值比较，#include#include#includeusing nam