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Cod sursa(job #927211)
#include<cstdio>
#include<vector>
#define mn -1
using namespace std;
vector<pair<int,int> >a[50001];
int n,m,smin,k,i,j,x,y,c,sum[50001],viz[50001],t[50001];
bool ok;
void citire()
{
freopen("dijkstra.in","r",stdin);
freopen("dijkstra.out","w",stdout);
scanf("%d %d",&n,&m);
for(i=1;i<=m;i++){
scanf("%d %d %d",&x,&y,&c);
a[x].push_back(make_pair(y,c));
}
}
void form()
{
for (i=1;i<=n;i++){
sum[i]=mn;
t[i]=1;
}
sum[1]=0;
k=1;
ok=true;
for(i=0;i<a[1].size();i++){
x=a[1][i].first;
c=a[1][i].second;
sum[x]=c;
}
}
void dijkstra()
{
form();
while (ok==true){
smin=99999;viz[k]=1;
for(i=1;i<=n;i++)
if(sum[i]<smin && viz[i]==0 && sum[i]>=0){
smin=sum[i];
k=i;
}
if (smin!=99999){
for(i=0;i<a[k].size();i++){
y=a[k][i].first;
c=a[k][i].second;
if(sum[y]>smin+c || sum[y]==-1){
sum[y]=smin+c;
t[y]=k;
}
}
}
else ok=false;
}
}
void afisare()
{
for(i=2;i<=n;i++)
if(sum[i]==mn)printf("0 ");
else printf("%d ",sum[i]);
}
int main()
{
citire();
dijkstra();
afisare();
return 0;
}