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Cod sursa(job #703336)
#include<fstream>
#include<vector>
#include<algorithm>
#include<queue>
const int maxn =50005;
const int inf=1000000;
using namespace std;
int n,m;
vector<pair<int, int> >G[maxn];
int dmin[maxn];
void citire()
{
int i;
ifstream f("dijkstra.in");
f>>n>>m;
int a,b,c;
for(i=0;i<m;++i)
{
f>>a>>b>>c;
G[a].push_back(make_pair(b,c));
}
}
void dijks()
{
bool viz[maxn];
queue<int>Q;
int i;
for(i=0;i<=maxn;i++)
{
dmin[i]=inf;
viz[i]=false;
}
dmin[1]=0;
Q.push(1);
viz[1]=true;
while(!Q.empty())
{
int nod=Q.front();
Q.pop();
viz[nod]=false;
for(vector<pair<int, int> > ::iterator it=G[nod].begin();it!=G[nod].end();++it)
if(dmin[nod]+it->second<dmin[it->first])
{
dmin[it->first]=dmin[nod]+it->second;
if(!viz[it->first])
{
Q.push(it->first);
viz[it->first]=true;
}
}
}
}
void afisez()
{
int i;
ofstream g("dijkstra.out");
for(i=2;i<=n;++i)
g<<(dmin[i]<inf ? dmin[i]: 0)<<" ";
}
int main()
{
citire();
dijks();
afisez();
}