Pagini recente » Cod sursa (job #504567) | Cod sursa (job #2666874) | Cod sursa (job #2485708) | Cod sursa (job #1437779) | Cod sursa (job #2936235)
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <bits/stdc++.h>
#define inf 0x3f3f3f3f
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int n, m, x, y, c;
priority_queue <pair<int,int>, vector<pair<int,int>>, greater<pair<int,int>>> pq;
vector<pair<int,int>>lista_adiacenta[250000];
vector<int> dist(n+1);
vector<int> tata(n+1);
vector<int> vizitat(n+1);
void dijkstra(int s){
for(int i=1; i<=n; i++){
dist[i]=inf;
vizitat[i]=0;
tata[i]=0;
}
dist[s]=0;
pq.push({dist[s], s});
while(!pq.empty()){
int nod = pq.top().second;
pq.pop();
for(auto i: lista_adiacenta[nod]){
int vecin = i.first;
int cost = i.second;
if(vizitat[vecin] == 0){
if(dist[nod] + cost < dist[vecin]){
dist[vecin] = dist[nod] + cost;
tata[vecin] = nod;
pq.push({dist[vecin], vecin});
}
}
vizitat[vecin]=1;
}
}
}
int main() {
fin>>n>>m;
for(int i=0; i<m; i++){
fin>>x>>y>>c;
lista_adiacenta[x].push_back({y, c});
}
dijkstra(1);
for(int i=2; i<=n; i++){
if(dist[i]==inf)
fout<<0<<" ";
else
fout<<dist[i]<<" ";
}
return 0;
}