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Cod sursa(job #735340)
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <queue>
#include <vector>
using namespace std;
#define nmax 50010
#define muchie pair<long, pair<long,long> >
#define cost first
#define start second.first
#define end second.second
struct other
{
long endd,costt;
};
struct edge
{
vector<other> neighbour;
};
edge nodes[nmax];
vector<long> used(nmax);
vector<long> dist(nmax);
long n,m,a,b,c;
priority_queue<muchie, vector<muchie>, greater<muchie> >q;
void read_input()
{
scanf("%ld %ld", &n,&m);
for(int i=0;i<m;i++)
{
scanf("%ld %ld %ld", &a,&b,&c);
other New;
New.endd=b;
New.costt=c;
nodes[a].neighbour.push_back(New);
}
}
void Dijkstra(long st)
{
dist[st]=0;
int nr=1;
do
{
used[st]=1;
for(int i=0;i<nodes[st].neighbour.size();i++)
{
if(used[nodes[st].neighbour[i].endd]==0)
{
q.push(make_pair(nodes[st].neighbour[i].costt,make_pair(st,nodes[st].neighbour[i].endd)));
}
}
muchie old=q.top();
q.pop();
dist[old.end]=dist[old.start]+old.cost;
st=old.end;
nr++;
}while(nr<n);
for(int i=2;i<=n;i++) printf("%ld ", dist[i]);
printf("\n");
}
int main()
{
freopen("dijkstra.in","r",stdin);
freopen("dijkstra.out","w",stdout);
//int i;
read_input();
Dijkstra(1);
//scanf("%i", &i);
return 0;
}