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Cod sursa(job #894639)
#include <iostream>
#include <fstream>
#define NMAX 1001
#define INFINIT 210000000
using namespace std;
long n,m,i,j,k,d[NMAX];
int C[NMAX][NMAX];
void dijkstra(long x0)
{
long i, j, min, k, ok;
int viz[NMAX];
long tata[NMAX];
for (i = 1; i<=n; i++) {
d[i] = C[x0][i];
tata[i] = x0;
viz[i] = 0;
}
tata[x0] = 0;
viz[x0] = 1; ok = 1;
while (ok) {
min = INFINIT;
for (i = 1; i<=n; i++)
if (!viz[i] && min>d[i]) {
min = d[i];
k = i;
}
if (min != INFINIT) {
viz[k] = 1;
for (i = 1; i<=n; i++)
if (!viz[i] && d[i]>d[k]+C[k][i]) {
d[i] = d[k]+C[k][i];
tata[i] = k;
}
}
else ok = 0;
}
}
int main ()
{
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
i=INFINIT;
f>>n>>m;
for (i=1; i<=n; i++)
for (j=1; j<=n; j++)
if (i==j) C[i][j]=0;
else C[i][j]=INFINIT;
for (i=1; i<=m; i++)
{
f>>j>>k;
f>>C[j][k];
}
dijkstra(1);
for (i=2; i<=n; i++) if (d[i]==INFINIT) g<<0<<" "; else g<<d[i]<<" ";
f.close(); g.close();
return 0;
}