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Cod sursa(job #701124)
#include<stdio.h>
const int pinfinit=36000;
int a[200][200],i,j,n,k,m,poz,s[100],t[200],d[200],r,min;
FILE *f;
FILE *g;
void citire_graf()
{
int x,y,z;
f=fopen("dijkstra","r");
g=fopen("dijkstra.out","w");
fscanf(f,"%d%d",&n,&k);
for(i=0;i<=n;i++)
for(j=0;j<=n;j++)
if(i!=j)
a[i][j]=pinfinit;
else
a[i][j]=0;
for(i=0;i<k;i++)
{
fscanf(f,"%d%d%d",&x,&y,&z);
a[x][y]=z;
}
}
void drum(int i)
{
if (t[i]!=0) drum(t[i]);
printf(" %d ",i);
}
int main()
{
citire_graf();
r=1;
s[r]=1;
for(i=1;i<=n;i++)
{
d[i]=a[r][i];
if(i!=r)
if(d[i]<pinfinit) t[i]=r;
}
for(i=1;i<=n-1;i++)
{
min=pinfinit;
for(j=1;j<=n;j++)
if(s[j]==0)
if(d[j]<min)
{
min=d[j];
poz=j;
}
s[poz]=1;
for(j=1;j<=n;j++)
if(d[j]>d[poz]+a[poz][j])
{
d[j]=d[poz]+a[poz][j];
t[j]=poz;
}
}
for(i=1;i<=n;i++)
if(i!=r)
if(t[i]!=0)
fprintf(g,"%d ",d[i]);
return 0;
}