Cod sursa(job #374687)

Utilizator GotenAmza Catalin Goten Data 17 decembrie 2009 21:32:30
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.51 kb
#include<fstream.h>

int a[251000],b[251000],c[251000],d[51000],i,ok,m,n,u;

int main()
{
	ifstream f("dijkstra.in");
	ofstream g("dijkstra.out");
	f>>n>>m;
	u=(1<<30);
	for(i=2;i<=n;i++)
		d[i]=u;
	for(i=1;i<=m;i++)
	{
		f>>a[i]>>b[i]>>c[i];
		if(a[i]==1)
			d[b[i]]=c[i];
	}
	ok=0;
	while(!ok)
	{
		ok=1;
		for(i=1;i<=m;i++)
			if(d[b[i]]>d[a[i]]+c[i])
			{
				d[b[i]]=d[a[i]]+c[i];
				ok=0;
			}
	}		
	for(i=2;i<=n;i++)
		if(d[i]==u)
			g<<"0 ";
		else
			g<<d[i]<<' ';
	return 0;
}