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Cod sursa(job #474064)
//100% working
#include<fstream>
#include <vector>
#include <queue>
#define NMAX 50001
#define INF 0x3f3f3f3f
using namespace std;
vector< pair< int, int> > G[NMAX];
int d[NMAX];
queue<int> Q;
int N;
bool is[NMAX];
inline void init()
{
memset(d,INF,sizeof(d));
memset(is,false,sizeof(is));
d[1]=0;
Q.push(1);
is[1]=true;
}
inline void citire()
{
int M;
ifstream fin("dijkstra.in");
fin>>N>>M;
int x,y,c;
for(int i=1;i<=M;i++)
{
fin>>x>>y>>c;
G[x].push_back(make_pair(y,c));
}
fin.close();
}
inline void afisare()
{
ofstream fout("dijkstra.out");
for(int i=2;i<=N;i++)
if(d[i]==INF) fout<<"0 ";
else
fout<<d[i]<<" ";
fout<<"\n";
fout.close();
}
void bell()
{
int x;
while(!Q.empty())
{
x=Q.front();
Q.pop();
is[x]=0;
for(vector< pair <int,int> >::iterator i=G[x].begin(); i!=G[x].end();i++)
{
if(d[x]+i->second<d[i->first])
{
d[i->first]=d[x]+i->second;
if(!is[i->first])
{
Q.push(i->first);
is[i->first]=true;
}
}
}
}
}
int main(int argc,char *argv[])
{
init();
citire();
bell();
afisare();
}