Pagini recente » Cod sursa (job #2873681) | Cod sursa (job #2582093) | Cod sursa (job #55377) | Cod sursa (job #2156228) | Cod sursa (job #2884132)
#include <bits/stdc++.h>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
const int NMAX = 50005;
const int INF = (1<<29);
vector < pair<int,int> > v[NMAX];
priority_queue < pair<int,int> > pq;
int n,m,dist[NMAX];
bool fixat[NMAX];
void citire(){
fin >> n >> m;
int x,y,cost;
for(int i=1;i<=m;i++){
fin >> x >> y >> cost;
v[x].push_back({y,cost});
v[y].push_back({x,cost});
}
for(int i=1;i<=n;i++) dist[i]=INF;
return;
}
void dijkstra(){
pq.push({0,1});
dist[1]=0;
while(!pq.empty()){
while(!pq.empty() and fixat[pq.top().second]==true)
pq.pop();
if(pq.empty()) return;
int node = pq.top().second;
int cost = pq.top().first;
fixat[node]=true;
for(int i=0;i<v[node].size();i++){
int vecin=v[node][i].first;
int cst=v[node][i].second;
if(dist[vecin]>dist[node]+cst){
dist[vecin]=dist[node]+cst;
}
pq.push({-dist[vecin],vecin});
}
}
}
void afis(){
for(int i=2;i<=n;i++){
if(dist[i]==INF) fout << 0 << ' ';
else fout << dist[i] << ' ';
}
return;
}
int main()
{
citire();
dijkstra();
afis();
return 0;
}