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Cod sursa(job #866716)
#include<iostream>
#include<fstream>
#define infin 10000000
using namespace std;
ifstream f("dijkstra.in");
ofstream out("dijkstra.out");
int n,m,C[20000][20000];
void dijkstra(int x)
{
int ok,min,k,d[50005],viz[50005];
for(int i=1; i<=n;i++)
{
viz[i]=0;
d[i]=C[x][i];
}
viz[x]=1;
ok=1;
while(ok)
{ min=infin;
for(int i=1;i<=n;i++)
{
if(!viz[i] && min>d[i])
{
min=d[i];
k=i;
}
}
if(min!=infin)
{
viz[k]=1;
for(int i=1;i<=n;i++)
if(!viz[i] && d[i]>d[k]+C[k][i] )
{ d[i]=d[k]+C[k][i];
}
}
else
ok=0;
}
for(int i=2;i<=n;i++)
out<<d[i]<<" ";
}
int main ()
{
int x,y,cost;
f>>n>>m;
for(int i=1; i<n; i++)
for(int j=i;j<=n;j++)
if(i==j)
C[i][j]=0;
else
C[i][j]=infin;
for(int i=1; i<=m;i++)
{ f>>x>>y>>cost;
C[x][y]=cost;
}
dijkstra(1);
f.close();
out.close();
return 0;
}