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Cod sursa(job #724636)
#include<fstream>
#include<vector>
#include<queue>
#define inf 0x3f3f3f
#define dim 50005
#include<iostream>
using namespace std;
ifstream in("dijkstra.in");
ofstream out("dijkstra.out");
struct rtt
{
int n,c;
};
vector <vector<rtt> > a(dim);
vector <int> d(dim,inf);
vector <bool> inq(dim,false);
queue <int> q;
int nn,m;
void citire()
{
int x0,y0,cc;
in>>nn;
in>>m;
for (int i=1;i<=m;++i)
{
in>>x0>>y0>>cc;
a[x0].push_back((rtt){y0,cc});
}
}
void bell(int nod)
{
int i;
q.push(nod);
d[nod]=0;
inq[nod]=true;
while (!q.empty())
{
nod=q.front();
q.pop();
inq[nod]=false;
for ( i=0;i<a[nod].size();++i)
if (d[a[nod][i].n]>d[nod]+a[nod][i].c)
{d[a[nod][i].n]=d[nod]+a[nod][i].c ;
if (inq[a[nod][i].n]==false)
{q.push(a[nod][i].n);inq[a[nod][i].n]=true;}
}
}
}
int main()
{
citire();
bell(1);
for (int i=2;i<=nn;++i)
if (d[i]!=inf) out<<d[i]<<" ";
else out<<"0";
return 0;
}