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Cod sursa(job #256323)
#include<stdio.h>
#include<values.h>
long a[500][500],n,m,d[500],s[500];
FILE *f;
void init ()
{
long i,j;
for (i=1;i<=n;++i)
{
d[i]=MAXLONG;
for (j=1;j<=n;++j)
a[i][j]=MAXLONG;
}
}
void read ()
{
f=fopen("dijkstra.in","r");
fscanf(f,"%ld%ld",&n,&m);
init ();
long i,x,y,c;
for (i=1;i<=m;++i)
{
fscanf(f,"%ld%ld%ld",&x,&y,&c);
a[x][y]=c;
}
fclose(f);
}
void solve ()
{
long i,j,min,poz;
s[1]=1;
d[1]=0;
for (i=2;i<=n;++i)
if (a[1][i]<MAXLONG)
{
d[i]=a[1][i];
//t[i]=1;
}
for (i=1;i<=n-1;++i)
{
min=MAXLONG;
for (j=2;j<=n;++j)
if (d[j]<min && !s[j])
{
min=d[j];
poz=j;
}
s[poz]=1;
for (j=1;j<=n;++j)
if (a[poz][j]!=MAXLONG&&d[j]>d[poz]+a[poz][j])
{
d[j]=d[poz]+a[poz][j];
//t[j]=poz;
}
}
}
void write ()
{
f=fopen("dijkstra.out","w");
long i;
for (i=2;i<=n;++i)
fprintf(f,"%ld ",d[i]);
fclose(f);
}
int main ()
{
read ();
solve ();
write ();
return 0;
}