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Cod sursa(job #552942)
#include <cstdio>
#include <list>
#include <set>
using namespace std;
int n,m;
int d[50002],inms[50002];
struct Compar{
bool operator()(int i,int j){
return d[i]<d[j];
}
};
list<pair<int,int> > l[50002];
list<pair<int,int> >::iterator it;
multiset<int ,Compar> ms;
void citire(){
scanf("%d %d",&n,&m);
int i,x,y,c;
for(i=1;i<=m;i++){
scanf("%d %d %d" , &x,&y,&c);
l[x].push_back(make_pair(y,c));
}
}
void dijkstra(int rad){
int i,poz;
for(i=1;i<=n;i++){
d[i]=1000000000;
inms[i]=0;
}
inms[rad]=1;
d[rad]=0;
ms.insert(rad);
while(!ms.empty()){
poz=*ms.begin();
ms.erase(ms.begin());
inms[poz]=0;
for(it=l[poz].begin();it!=l[poz].end();++it)
if(d[(*it).first]>d[poz]+(*it).second){
if(inms[(*it).first]==1){
ms.erase((*it).first);
}
else {
inms[(*it).first]=1;
}
d[(*it).first]=d[poz]+(*it).second;
ms.insert((*it).first);
}
}
}
void afisare(){
int i;
for(i=2;i<=n;i++)
if(d[i]!=1000000000)
printf("%d ",d[i]);
else printf("0 ");
printf("\n");
}
int main(){
freopen("dijkstra.in","r",stdin);
freopen("dijkstra.out","w",stdout);
citire();
dijkstra(1);
afisare();
return 0;
}