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Cod sursa(job #786297)
#include<fstream>
#include<vector>
#include<queue>
using namespace std;
#define NMAX 50010
#define LMAX 250000000
int n,m;
vector < pair<int, int> > g[NMAX];
int dist[NMAX];
queue <int> q;
bool inq[NMAX];
void read()
{
int i;
int x,y,z;
ifstream fin("dijkstra.in");
fin>>n>>m;
for (i=1; i<=m; ++i)
{
fin>>x>>y>>z;
g[x].push_back( make_pair(y,z) );
}
fin.close();
}
void dijkstra()
{
int i,elem;
vector < pair<int, int> > :: iterator it;
for (i=2; i<=n; ++i)
dist[i] = LMAX;
q.push(1);
while (!q.empty())
{
elem = q.front();
for (it=g[elem].begin(); it!=g[elem].end(); ++it)
if (dist[it -> first] > dist[elem] + it -> second)
{
dist[it -> first] = dist[elem] + it -> second;
if (inq[it -> first] == 0)
{
q.push(it -> first);
inq[it -> first] = 1;
}
}
inq[elem] = 0;
q.pop();
}
}
void write()
{
int i;
ofstream fout("dijkstra.out");
for (i=2; i<=n; ++i)
if (dist[i] != LMAX)
fout<<dist[i]<<" ";
else
fout<<"0 ";
fout<<'\n';
fout.close();
}
int main()
{
read();
dijkstra();
write();
return 0;
}