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Cod sursa(job #650840)
#include<vector>
#include<ctime>
#include<fstream>
#define INF 10000000
#define nmax 5002
#define mmax 250000
using namespace std;
ifstream f("dijkstra.in",fstream::in);
ofstream g("dijkstra.out",fstream::out);
int a[nmax][nmax],s[nmax],d[nmax],n,m;
void init()
{
f>>n;
int i,j;
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
if(i==j)
a[i][j]=0;
else
a[i][j]=INF;
}
void citire()
{
f>>m;
int x,y,c,i;
for(i=1;i<=m;i++)
{
f>>x>>y>>c;
a[x][y]=c;
}
}
void generare_dijkstra(int x)
{
int i,j,min,y;
for(i=1;i<=n;i++)
{
d[i]=a[x][i];
}
s[x]=1;
for(i=1;i<=n-1;i++)
{
for(j=1,min=INF;j<=n;j++)
if(s[j]==0 && d[j]<min)
{
min=d[j];
y=j;
}
s[y]=1;
for(j=1;j<=n;j++)
if(s[j]==0 && d[y]+a[y][j]<d[j])
d[j]=d[y]+a[y][j];
}
}
void tipar()
{
int i;
for(i=2;i<=n;i++)
g<<d[i]<<" ";
}
int main()
{ init();
citire();
generare_dijkstra(1);
tipar();
f.close();
g.close();
}