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Cod sursa(job #474008)
//100% working
#include<fstream>
#include <vector>
#include <queue>
#define NMAX 50001
#define INF 0x3f3f3f3f
using namespace std;
vector<int> G[NMAX],C[NMAX];
int d[NMAX];
int Q[1<<25],st,dr;
int N;
int is[NMAX];
void init()
{
memset(d,INF,sizeof(d));
d[1]=0;
Q[++dr]=1;
is[1]=1;
}
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(y);
C[x].push_back(c);
}
fin.close();
}
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;
unsigned int i;
while(st<=dr)
{
x=Q[st++];
is[x]=0;
for(i=0;i<G[x].size();i++)
{
if(d[x]+C[x][i]<d[G[x][i]])
{
d[G[x][i]]=d[x]+C[x][i];
if(!is[G[x][i]])
{
Q[++dr]=G[x][i];
is[G[x][i]]=1;
}
}
}
}
}
int main(int argc,char *argv[])
{
init();
citire();
bell();
afisare();
}