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Cod sursa(job #786295)
#include<fstream>
#include<vector>
#include<queue>
#define dmax 50002
#define inf 999999
using namespace std;
int n,m;
int d[dmax];
bool inq[dmax];
vector< pair<int, int> > a[dmax];
queue<int> q;
void citire()
{
int i,x,y,c;
ifstream fin("dijkstra.in");
fin>>n>>m;
for (i=1; i<=m; i++)
{
fin>>x>>y>>c;
a[x].push_back(make_pair(y,c));
}
fin.close();
}
void solve()
{
int i,elem;
vector< pair<int, int> >::iterator it;
q.push(1);
inq[1]=1;
for (i=2; i<=n; i++)
d[i]=inf;
while (q.size())
{
elem=q.front();
for (it = a[elem].begin(); it != a[elem].end(); it++)
if (d[it -> first] > d[elem] + it -> second)
{
d[it -> first] = d[elem] + it->second;
if (inq[it -> first] == 0)
{
q.push(it -> first);
inq[it -> first]=1;
}
}
inq[elem]=0;
q.pop();
}
}
void afisare()
{
int i;
ofstream fout("dijkstra.out");
for (i=2; i<=n; i++)
if (d[i]!=inf)
fout<<d[i]<<" "; else
fout<<"0 ";
fout.close();
}
int main()
{
citire();
solve();
afisare();
return 0;
}