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Cod sursa(job #410307)
#include <iostream>
#include <fstream>
#define N 50000
#define infinit 2000000000
using namespace std;
int cost[2048][2048];
char viz[N];
int main()
{
fstream f("dijkstra.in",ios::in), g("dijkstra.out",ios::out);
int m,n,i,j,x,y,c,d[N],min;
f>>n>>m;
for(i=1;i<=n;i++)
{
d[i]=infinit;
for(j=1;j<=n;j++)
if(i!=j) cost[i][j]=infinit;
}
for(i=1;i<=m;i++)
{
f>>x>>y>>c;
cost[x][y]=c;
}
d[1]=0;
viz[1]=1;
for(i=1;i<=n;i++)
d[i]=cost[1][i];
int vf;
do{
min=infinit;
for(i=1;i<=n;i++)
if(viz[i]==0&&d[i]<min)
{
min=d[i]; vf=i;
}
if(min<infinit)
{
viz[vf]=1;
for(i=1;i<=n;i++)
if(viz[i]==0&&d[vf]+cost[vf][i]<d[i])
{
d[i]=d[vf]+cost[vf][i];
}
}
}while(min<infinit);
for(i=2;i<=n;i++)
if(d[i]==infinit)
g<<0<<" ";
else
g<<d[i]<<" ";
g.close();
f.close();
return 0;
}