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Cod sursa(job #693627)
#include<fstream.h>
using namespace std;
ifstream in("dijkstra.in");
ofstream out("dijkstra.out");
struct nod{
int y,ct;
nod*next;
};
nod* l[50001];
int d[50001],n,m,s[50001];
void add(int x,int y,int ct){
nod*n=new(nod);
n->y=y;
n->ct=ct;
n->next=l[x];
l[x]=n;
void citire(){
in>>n>>m;
for(int i=1;i<=m;i++){
int x,y,ct;
in>>x>>y>>ct;
add(l[x],y,ct);
}
}
void dijkstra(int r){
nod*nc=l[r]; int min=1000000000,poz;
while(nc){
d[nc->y]=nc->ct;
if(min>nc->ct){min=nc->ct; poz=nc->y;}
nc=nc->next;
}
s[r]=1;
for(int j=1;j<n;j++){
for(int i=1;i<=n;i++)
if(d[i]&&min<d[i]){
min=d[i];
poz=i;
}
s[poz]=1;
nc=l[poz];
while(nc){
int sc=d[poz]+nc->ct;
if(sc<d[nc->y]||d[nc->y]==0)
d[nc->y]=sc;
nc=nc->next;
}
}
}
int main(){
citire();
int r=1;
dijkstra(r);
for(int i=2;i<=n;i++)
out<<d[i]<<" ";
out<<endl;
return 0;
}