Pagini recente » Cod sursa (job #1966567) | Cod sursa (job #1994942) | Cod sursa (job #550037) | Cod sursa (job #2036997) | Cod sursa (job #1436966)
#include <fstream>
#include <string.h>
#define dim 50001
#define INF 1 << 28
#include <set>
#include <vector>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int d[dim],i,j,a,b,c,n,m;
vector < pair <int,int> > G[dim];
multiset < pair <int,int> > heap;
int main()
{
fin>>n>>m;
for(i=1;i<=m;i++)
{
fin>>a>>b>>c;
G[a].push_back(make_pair(b,c));
}
memset(d,INF,sizeof(d));
d[1]=0;
while(!heap.empty())
{
pair <int,int> aux=*heap.begin();
heap.erase(aux);
for(vector <pair <int,int> >::iterator it=G[aux.first].begin();it!=G[aux.first].end();it++)
{
if(d[aux.first]+it->second<d[it->first])
{
heap.erase(make_pair(it->first,d[it->first]));
d[it->first]=d[aux.first]+it->second;
heap.insert(make_pair(it->first,d[it->first]));
}
}
}
for(i=2;i<=n;i++)
if(d[i]!=INF)
fout<<d[i]<<" ";
else
fout<<0<<" ";
return 0;
}