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Cod sursa(job #891931)
#include<fstream>
#define inf 1000000000
#define NMax 300003
using namespace std;
ifstream f("bellmanford.in");
ofstream g("bellmanford.out");
struct Nod
{
int nod, cost;
Nod *next;
};
Nod *t,*Vecin[NMax];
int j,m,n,x,y,costul,nod,d[NMax],coada[5*NMax];
void adauga(int x, int y, int costul)
{
Nod *q = new Nod;
q->nod = y;
q->cost = costul;
q->next = Vecin[x];
Vecin[x] = q;
}
void bellman_ford(){
int p,u,i;
for(i=1;i<=n;i++)
d[i]=inf;
p=1;u=1;
coada[u]=1;
d[1]=0;
while (p<=u)
{
j=coada[p];
p++;
t=Vecin[j];
while(t)
{
if(d[t->nod]>d[j]+t->cost)
{
coada[++u]=t->nod;
d[t->nod]=d[j]+t->cost;
}
t=t->next;
}
}
}
int main()
{
int i;
f>>n>>m;
for(i=1;i<=m;i++)
{
f>>x>>y>>costul;
adauga(x,y,costul);
}
bellman_ford();
for ( int i = 2; i <= n; i++ )
if(d[i] == inf)
g<<0<<" ";
else
g<< d[i]<<" ";
f.close();
g.close();
return 0;
}