Pagini recente » Rating Balmau Oana (nerita) | Cod sursa (job #1901008) | Cod sursa (job #1042742) | Cod sursa (job #1716932) | Cod sursa (job #2871211)
#include <fstream>
#include <vector>
#include <utility>
#include <queue>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector<pair<int,int>> graf[50001];
bool vizitat[50001];
int distanta[50001];
int INFINIT=0x3f3f3f;
void dijkstra(int startNod){
distanta[startNod]=0;
priority_queue<pair<int,int>> q;
q.push({distanta[startNod], startNod});
while(q.empty()!=0){
int nod=q.top().second;
q.pop();
if(vizitat[nod])
continue;
vizitat[nod]=true;
for(int i=0; i<graf[nod].size(); i++){
if(distanta[nod]+graf[nod][i].second<distanta[graf[nod][i].first]){
distanta[graf[nod][i].first]=distanta[nod]+graf[nod][i].second;
q.push({-distanta[graf[nod][i].first],graf[nod][i].first});
}
}
}
}
int main()
{
int n,m;
while(m){
int x,y,cost;
fin>>x>>y>>cost;
graf[x].push_back({y,cost});
m--;
}
for(int i=1; i<=n; i++)
distanta[i]=INFINIT;
dijkstra(1);
for(int i=2; i<=n; i++)
if(distanta[i]!=INFINIT)
fout<<distanta[i]<<" ";
else
fout<<0<<" ";
return 0;
}