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Cod sursa(job #693631)
#include<fstream>
#include<iostream>
using namespace std;
ifstream in("dijkstra.in");
ofstream out("dijkstra.out");
#define infinit 1000000000
struct nod{
int y,ct;
nod* next;
};
nod *l[500001];
int d[500001],n,m,s[500001];
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;
int x,y,ct;
for(int i=1;i<=m;i++){
in>>x>>y>>ct;
add(x,y,ct);
}
}
void dijkstra(int r){
nod *nc=l[r];
int min=infinit,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++){
min=infinit;
for(int i=1;i<=n;i++)
if(d[i]!=0&&!s[i])
if(d[i]<min){
poz=i;
min=d[i];
}
s[poz]=1;
nc=l[poz];
while(nc){
int sc=d[poz]+nc->ct;
if(!s[nc->y]&&(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<<"\n";
return 0;
}