Mai intai trebuie sa te autentifici.
Cod sursa(job #1795242)
Utilizator | Data | 2 noiembrie 2016 09:32:16 | |
---|---|---|---|
Problema | Algoritmul lui Dijkstra | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.98 kb |
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin ("dijkstra.in");
ofstream fout ("dijkstra.out");
struct vecin
{
int e1, cost;
};
queue <int> q;
vector <vecin> L[50005];
int h[50005], n, m;
void citire()
{
fin >> n >> m;
int a, b, c;
for(int i=1;i<=m;i++)
{
fin >> a >> b >> c;
L[a].push_back({b, c});
}
for(int i=1;i<=n;i++)
h[i]=9999999;
}
void dijkstra(int nod)
{
q.push(nod);
h[nod]=0;
while(!q.empty())
{
nod=q.front();
q.pop();
for(unsigned int i=0;i<L[nod].size();i++)
{
int vecin=L[nod][i].e1;
if(h[nod]+L[nod][i].cost<h[vecin])
{
h[vecin]=h[nod]+L[nod][i].cost;
q.push(vecin);
}
}
}
}
int main()
{
citire();
dijkstra(1);
for(int i=2;i<=n;i++)
fout << h[i] << " ";
return 0;
}