Mai intai trebuie sa te autentifici.
Cod sursa(job #3042360)
| Utilizator | Data | 5 aprilie 2023 21:56:01 | |
|---|---|---|---|
| Problema | Algoritmul lui Dijkstra | Scor | 0 |
| Compilator | cpp-64 | Status | done |
| Runda | Arhiva educationala | Marime | 1.04 kb |
#include <bits/stdc++.h>
using namespace std;
ifstream fin ("dij.in");
ofstream fout ("dij.out");
int n,m,i,x,y,d,apropiat,nod,dist,distanta[1000001],vizitat[1000001];
vector<pair<int,int>> v[1000001];
priority_queue<pair<int,int>> q;
int main()
{
fin>>n>>m;
while(fin>>x>>y>>d){
v[x].push_back({y,d});
}
for(int i=1;i<=n;++i){
distanta[i]=1000001;
}
distanta[1]=0;
q.push({0,1});
while(!q.empty()){
apropiat=q.top().second;
q.pop();
if(vizitat[apropiat]==0){
vizitat[apropiat]=1;
for(auto element: v[apropiat]){
nod=element.first;
dist=element.second;
if(distanta[nod]>distanta[apropiat]+dist){
distanta[nod]=distanta[apropiat]+dist;
q.push({-distanta[nod],nod});
}
}
}
}
for(i=2;i<=n;i++){
if(distanta[i]==1000001)fout<<-1<<" ";
else fout<<distanta[i]<<" ";
}
return 0;
}