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Cod sursa(job #700033)
#include <iostream>
#include <vector>
#include <list>
#include <queue>
#include <bitset>
#include <fstream>
#define NMAX 50005
#define DMAX 0xfffffff
using namespace std;
fstream fin("dijkstra.in", ios::in), fout("dijkstra.out", ios::out);
void read(),solve(),write();
typedef pair<unsigned int,unsigned int> pereche;
typedef list<pereche> lista;
struct cmp
{
bool operator()(const pereche &a, const pereche &b)
const
{
return a.second>b.second;
}
};
lista G[NMAX];
vector<unsigned int> dist(NMAX,DMAX);
priority_queue<pereche,vector<pereche>,cmp>coada;
bitset<NMAX> verificat(0);
int N,M;
int main()
{
read();
solve();
write();
return 0;
}
void write()
{
for(int i=2;i<=N;i++)
cout<<nounitbuf<<(dist[i]!=DMAX?dist[i]:0)<<" ";
}
void solve()
{
dist[1]=0;
coada.push(pereche(1,0));
while(!coada.empty())
{
pereche aux=coada.top();
unsigned int nod=aux.first, cost=aux.second;
coada.pop();
if(!verificat[nod])
{
for(lista::iterator it=G[nod].begin();it!=G[nod].end();it++)
if(dist[(*it).first]>cost+(*it).second)
{
dist[(*it).first]=cost+(*it).second;
coada.push(pereche((*it).first,dist[(*it).first]));
}
verificat[nod]=true;
}
}
}
void read()
{
fin >> N >> M;
for(int i=0;i<M;i++)
{
int s,d,c;
fin >> s >> d >> c;
G[s].push_back(pereche(d,c));
}
}