Pagini recente » Cod sursa (job #2824146) | Cod sursa (job #2707577) | Cod sursa (job #2044113) | Cod sursa (job #1631802) | Cod sursa (job #2707580)
#include<cstdio>
#include<vector>
#include<algorithm>
#include<cstdlib>
#include<queue>
using namespace std;
FILE *f=fopen("dijkstra.in","r");
FILE *g=fopen("dijkstra.out","w");
//FILE *f=fopen("f.in","r");
//FILE *g=fopen("f.out","w");
const long oo=(1<<30);
long N;
long M;
long D[50001];
vector <pair<long ,long> > G[50001];
void Citeste()
{
fscanf(f,"%d%d",&N,&M);
for(long i=1;i<=M;i++)
{
long x,y,dist;
fscanf(f,"%d%d%d",&x,&y,&dist);
G[x].push_back(make_pair(y,dist));
}
}
void Afiseaza()
{
for(long i=2;i<=N;i++)
{
if(D[i]!=oo)
fprintf(g,"%d ",D[i]);
else fprintf(g,"0 ");
}
}
void Dijkstra(long nodStart)
{
for(long i=1;i<=N;i++)
D[i]=oo;
D[nodStart]=0;
long c[50001];long p=0,u=0;
c[0]=nodStart;
while(p<=u)
{
long nodCurent = c[p];
for(unsigned long i =0;i<G[nodCurent].size();i++)
{
long nodVecin = G[nodCurent][i].first;
long Cost = G[nodCurent][i].second;
if(D[nodCurent]+Cost<D[nodVecin])
{
D[nodVecin]=D[nodCurent]+Cost;
u++;
c[u]=nodVecin;
}
}
p++;
}
}
int main()
{
Citeste();
Dijkstra(1);
Afiseaza();
fclose(f);
fclose(g);
return 0;
}