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Cod sursa(job #724705)
#include <fstream>
#include <vector>
#include <queue>
#define inf (1<<30)
#define nmax 50005
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
int n, m, d[nmax];
vector<pair<int, int> > gf[nmax];
void citeste(){
f >> n >> m;
for(int i=1; i<=m; i++){
int x, y, z;
f >> x >> y >> z;
gf[x].push_back(make_pair(y,z));
}
}
struct cmp{
bool operator() (int a, int b){
return d[a] < d[b];
}
};
void rezolva(){
for(int i=1; i<=n; i++) d[i] = inf;
d[1] = 0;
priority_queue<int,vector<int>, cmp> Q;
Q.push(1);
for(; Q.size(); ){
int nod = Q.top();
Q.pop();
for(int i=0; i<gf[nod].size(); i++){
int vc = gf[nod][i].first;
int cost = gf[nod][i].second;
if (d[vc] > d[nod] + cost){
d[vc] = d[nod] + cost;
Q.push(vc);
}
}
}
}
void scrie(){
for(int i=2; i<=n; i++){
if (d[i] == (1<<30)) g << 0 << " ";
else g << d[i] << " ";
}
}
int main(){
citeste();
rezolva();
scrie();
f.close();
g.close();
return 0;
}