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Cod sursa(job #901579)
#include<stdio.h>
#include<vector>
using namespace std;
const int maxn=200005,inf=99999999;
int n,m,nh,cost;
int x[maxn],d[maxn],poz[maxn];
vector < pair<int,int> > l[maxn];
void cit()
{
int i;
int a,b,c;
scanf("%d%d",&n,&m);
for(i=1;i<=m;i++)
{
scanf("%d%d%d",&a,&b,&c);
l[a].push_back(make_pair(b,c));
l[b].push_back(make_pair(a,c));
}
for(i=1;i<=n;i++)
{
x[i]=i;
poz[i]=i;
d[i]=inf;
}
nh=n;
d[1]=0;
}
void swap(int i,int j)
{
int aux;
aux=x[i];
x[i]=x[j];
x[j]=aux;
poz[x[i]]=i;
poz[x[j]]=j;
}
void heap_up(int k)
{
int i;
if(k<=1) return;
i=k/2;
if(d[x[i]]>d[x[k]])
{
swap(i,k);
heap_up(i);
}
}
void heap_dw(int k)
{
int i=2*k;
if(i<=nh)
{
if(i+1<=nh && d[x[i+1]]<d[x[i]]) i++;
if(d[x[i]]<d[x[k]])
{
swap(i,k);
heap_dw(i);
}
}
}
int min_heap()
{
swap(1,nh);
poz[x[nh]]=0;
nh--;
return x[nh+1];
}
void dijkstra()
{
int nod;
while(nh>0)
{
nod=min_heap();
heap_dw(1);
cost+=d[nod];
for(unsigned int i=0;i<l[nod].size();i++)
if(poz[l[nod][i].first] && d[nod]+l[nod][i].second<d[l[nod][i].first])
{
d[l[nod][i].first]=d[nod]+l[nod][i].second;
heap_up(poz[l[nod][i].first]);
}
}
}
void afis()
{
int i;
for(i=2;i<=n;i++)
if(d[i]==inf) printf("0 ");
else
printf("%d ",d[i]);
}
int main()
{
freopen("dijkstra.in","r",stdin);
freopen("dijkstra.out","w",stdout);
cit();
dijkstra();
afis();
fclose(stdin);
fclose(stdout);
return 0;
}