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Cod sursa(job #558556)
#include<fstream>
#include<iostream>
using namespace std;
#define infinit 100000
#define max 5000
int a[max][max], n,m, start, d[max], s[max], prec[max];
void citire()
{
int i, j, x, y, cost;
ifstream f("dijkstra.in");
f>>n>>m;
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
a[i][j]=infinit;
for(i=1;i<=m;i++)
{
f>>x>>y>>cost;
a[x][y]=cost;
}
f.close();
}
void initializare()
{
int i;
s[start]=1;
for(i=1;i<=n;i++)
if(a[start][i]!=infinit)
{
d[i]=a[start][i];
prec[i]=start;
}
else
d[i]=infinit;
}
void dijkstra()
{
int gasit, min, k=start, i;
do{
gasit=0;
min=infinit;
for(i=1;i<=n;i++)
if(s[i]==0&&d[i]<min)
{
min=d[i];
k=i;
gasit=1;
}
s[k]=1;
for(i=1;i<=n;i++)
if(d[i]>d[k]+a[k][i])
{
prec[i]=k;
d[i]=d[k]+a[k][i];
}
}while(gasit);
}
void afisare()
{
int i;
ofstream g("dijkstra.out");
for(i=2;i<=n;i++)
g<<d[i]<<" ";
}
int main()
{
citire();
start=1;
initializare();
dijkstra();
afisare();
return 0;
}