标签:最短路
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#include <map> #include <set> #include <list> #include <queue> #include <stack> #include <vector> #include <cmath> #include <cstdio> #include <cstring> #include <iostream> using namespace std; const int N = 1010; const int M = 100010; const int inf = 0x3f3f3f3f; int dist[N]; int cost[N]; int head[N]; int tot, n, m; struct node { int weight; int cost; int next; int to; }edge[M << 1]; void addedge(int from, int to, int weight, int p) { edge[tot].weight = weight; edge[tot].cost = p; edge[tot].to = to; edge[tot].next = head[from]; head[from] = tot++; } void spfa(int v0) { memset (dist, inf, sizeof(dist)); memset (cost, inf, sizeof(cost)); dist[v0] = 0; cost[v0] = 0; queue <int> qu; while (!qu.empty()) { qu.pop(); } qu.push(v0); while (!qu.empty()) { int u = qu.front(); qu.pop(); for (int i = head[u]; ~i; i = edge[i].next) { int v = edge[i].to; // printf("%d %d\n", dist[v], dist[u] + edge[i].weight); if (dist[v] > dist[u] + edge[i].weight) { dist[v] = dist[u] + edge[i].weight; cost[v] = cost[u] + edge[i].cost; qu.push(v); } else if(dist[v] == dist[u] + edge[i].weight && cost[v] > cost[u] + edge[i].cost) { dist[v] = dist[u] + edge[i].weight; cost[v] = cost[u] + edge[i].cost; qu.push(v); } } } } int main() { int u, v, w, p; while (~scanf("%d%d", &n, &m)) { if (!n && !m) { break; } memset (head, -1, sizeof(head)); tot = 0; for (int i = 0; i < m; ++i) { scanf("%d%d%d%d", &u, &v, &w, &p); addedge(u, v, w, p); addedge(v, u, w, p); } scanf("%d%d", &u, &v); spfa(u); printf("%d %d\n", dist[v], cost[v]); } }
标签:最短路
原文地址:http://blog.csdn.net/guard_mine/article/details/41346095