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Cod sursa(job #821328)
#include <stdio.h>
#include<set>
#include<utility>
#include<vector>
using namespace std;
#define nmax 50005
#define inf 1<<30
struct element{long n,c;};
long n, m, i, dmin[nmax], a, b, c;
set <pair <long, long> > h;
pair <long, long> x;
vector <element> ma[nmax];
vector <element>::iterator it;
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=2;i<=n;i++)
dmin[i]=inf;
h.insert(make_pair(0,1));
while (h.size())
{
x=*h.begin(); h.erase(h.begin());
for (it=ma[x.second].begin();it!=ma[x.second].end();it++)
if (dmin[(*it).n]>dmin[x.second]+(*it).c)
{
dmin[(*it).n]=dmin[x.second]+(*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++)
printf("%ld ",dmin[i]);
return 0;
}