Pagini recente » Cod sursa (job #375590) | Cod sursa (job #673290) | Cod sursa (job #1367779) | Cod sursa (job #2539048) | Cod sursa (job #2372366)
#include <bits/stdc++.h>
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
const int INF=0x3f3f3f3f;
int n,m,dist[50003];
vector< pair<int, int> >v[50003];
set<pair<int, int> > h;
int main()
{
int i,x,y,c,nod,cost,to;
vector< pair<int, int> >::iterator it;
f>>n>>m;
for(i=1;i<=m;i++)
{
f>>x>>y>>c;
v[x].push_back(make_pair(y,c));
}
h.insert(make_pair(0,1));
fill(dist+1,dist+n+1,INF);
dist[1]=0;
while(!h.empty())
{
nod=h.begin()->second;
h.erase(h.begin());
for(it=v[nod].begin();it!=v[nod].end();++it)
{
to=it->first;
cost=it->second;
if(dist[to]>dist[nod]+cost)
{
if(dist[to]!=INF) {
h.erase(h.find(make_pair(dist[to],to)));
}
dist[to]=dist[nod]+cost;
h.insert(make_pair(dist[to],to));
}
}
}
for(i=2;i<=n;i++)
if(dist[i]==INF) g<<0<<' ';
else g<<dist[i]<<' ';
g<<'\n';
f.close();
g.close();
return 0;
}