Pagini recente » Cod sursa (job #648948) | Cod sursa (job #39155) | Cod sursa (job #1360351) | Cod sursa (job #1107782) | Cod sursa (job #2176080)
#include <cstdio>
#include <vector>
#include <queue>
using namespace std;
struct edge
{
int next,cost;
};
class compare
{
public:
bool operator () (edge &x,edge &y)
{
return x.cost>y.cost;
}
} ;
vector <edge> v[50001];
priority_queue <edge, vector<edge>, compare> H;
int dist[50001];
bool viz[50001];
void Dijkstra (int S)
{
dist[S]=0;
int K,j;
edge E;
E.next=S;
E.cost=dist[S];
H.push(E);
while (!H.empty())
{
K=H.top().next;
H.pop();
if (viz[K]==0)
{
viz[K]=1;
for (j=0; j<v[K].size(); j++)
{
if (dist[v[K][j].next]>dist[K]+v[K][j].cost&&viz[v[K][j].next]==0)
{
dist[v[K][j].next]=dist[K]+v[K][j].cost;
E.next=v[K][j].next;
E.cost=dist[v[K][j].next];
H.push(E);
}
}
}
}
}
int main()
{
freopen ("dijkstra.in","r",stdin);
freopen ("dijkstra.out","w",stdout);
int i,n,m;
int a;
edge b,aux;
scanf ("%d %d",&n,&m);
for (i=1; i<=m; i++)
{
scanf ("%d %d %d",&a,&b.next,&b.cost);
aux.next=a;
aux.cost=b.cost;
v[a].push_back(b);
v[b.next].push_back(aux);
}
for (i=1; i<=n; i++)
{
dist[i]=2000000000;
}
Dijkstra(1);
for (i=2; i<=n; i++)
{
printf ("%d ",dist[i]);
}
printf ("\n");
return 0;
}