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Cod sursa(job #561134)
#include<vector>
#include<fstream>
using namespace std;
#define nn 50001
#define pb push_back
#define mp make_pair
#define infinit 1<<30
vector< pair <int,int> >g[nn];
int n,m,d[nn],v[nn];
void citire(){
int a,b,c;
ifstream fin("dijsktra.in");
fin>>n>>m;
for(;m;--m){
fin>>a>>b>>c;
g[a].pb(mp(b,c));
}
}
void afisare(){
FILE *f=fopen("dijkstra.out","w");
for(int i=2;i<=n;++i)
fprintf(f,"%d ",d[i]!=infinit?d[i]:0);
}
void bellmann(int sursa){
for(int i=1;i<=n;++i)
d[i]=infinit;
d[sursa]=0;
v[sursa]=1;
int coada[nn],st,dr,i;
st=dr=1;
coada[1]=sursa;
while(st<=dr){
int k=coada[st++];
//v[k]=0;//esential
//if(d[k]<infinit)
for(i=0;i<g[k].size();++i){
int kk=g[k][i].first;
int cost=g[k][i].second;
if(d[k]+cost<d[kk]){
d[kk]=d[k]+cost;
//if(!v[kk]){
v[kk]=1;
coada[++dr]=kk;
//}
}
else
if(!v[kk]){
v[kk]=1;
coada[++dr]=kk;
}
}
}
}
int main(){
citire();
bellmann(1);
afisare();
return 0;
}