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Cod sursa(job #903246)
#include<stdio.h>
#include<vector>
#include<set>
using namespace std;
#define nmax 50005
#define inf nmax*1000
struct element{long n, c;};
long a, b, c, dmin[nmax], n, m, i;
vector <element> ma[nmax];
vector <element> ::iterator it;
set <pair <long, long> > h;
pair <long, long> pr;
element el;
void citire()
{
scanf("%ld %ld",&n,&m);
for (i=1;i<=m;i++)
{
scanf("%ld %ld %ld",&a,&b,&c);
el.n=b; el.c=c; ma[a].push_back(el);
}
}
void rezolvare()
{
for (i=1;i<=n;i++)
dmin[i]=inf;
dmin[1]=0;
h.insert(make_pair(0,1));
while (h.size())
{
pr=*h.begin(); h.erase(h.begin());
for (it=ma[pr.second].begin();it!=ma[pr.second].end();it++)
if (dmin[(*it).n]>pr.first+(*it).c)
{
h.erase(make_pair(dmin[(*it).n],(*it).n));
dmin[(*it).n]=pr.first+(*it).c;
h.insert(make_pair(dmin[(*it).n],(*it).n));
}
}
}
int main()
{
freopen("dijkstra.in","r",stdin);
freopen("dijkstra.out","w",stdout);
citire();
rezolvare();
for (i=2;i<=n;i++)
if (dmin[i]!=inf)
printf("%ld ",dmin[i]);
else
printf("0 ");
return 0;
}