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Cod sursa(job #258256)
#include<stdio.h>
#include<string.h>
#define maxn 50001
#define oo 0x3f3f3f3f
#define mod (1<<16)-1
FILE *f=fopen("dijkstra.in","r"), *g=fopen("dijkstra.out","w");
struct lista{ int nod,c;
lista *urm;} *G[maxn];
int n,m,i,d[maxn],prim,ultim,x,y,cost,Q[(1<<16)+13];
bool viz[maxn];
void citire()
{
lista *q;
fscanf(f,"%d %d",&n,&m);
for(int i=1;i<=m;i++)
{
fscanf(f,"%d %d %d",&x,&y,&cost);
q= new lista;
q->nod=y;
q->c=cost;
q->urm=G[x];
G[x]=q;
}
}
int main()
{
citire();
memset(d,oo,sizeof(d));
memset(viz,0,sizeof(viz));
lista *p;
prim=ultim=1;
Q[prim]=1;
viz[1]=1;
d[1]=0;
while(prim<=ultim)
{
x=Q[prim];
prim++;
prim&=mod;
viz[x]=0;
for(p=G[x]; p!=NULL; p=p->urm)
{
if(d[x]+p->c<d[p->nod])
{
d[p->nod]=d[x]+p->c;
if(!viz[p->nod])
{
viz[p->nod]=1;
++ultim;
ultim&=mod;
Q[ultim]=p->nod;
}
}
}
}
for(i=2; i<=n;i++)
if(d[i]==oo) fprintf(g,"0 ");
else fprintf(g,"%d ",d[i]);
fprintf(g,"\n");
fclose(f);
fclose(g);
return 0;
}