Pagini recente » Cod sursa (job #483930) | Cod sursa (job #2805640) | Cod sursa (job #920744) | Cod sursa (job #1033868) | Cod sursa (job #2471798)
#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> > q;
int dist[NMAX];
bool fix[NMAX];
void dijkstra()
{
for(int i=1;i<=NMAX;i++) dist[i]=INF;
dist[1]=0;
q.push({0,1});
while(!q.empty())
{
while(!q.empty() and fix[q.top().second]==true)
q.pop();
if(q.empty()) return;
int nod=q.top().second;
fix[nod]=true;
for(int i=0;i<v[nod].size();i++)
{
int vecin=v[nod][i].first;
int lg=v[nod][i].second;
if(dist[vecin]>dist[nod]+lg) dist[vecin]=dist[nod]+lg;
q.push({-dist[vecin],vecin});
}
}
}
int main()
{
int n,m,x,y,cost;
fin >> n >> m;
for(int i=1;i<=m;i++)
{
fin >> x >> y >> cost;
v[x].push_back({y,cost});
}
dijkstra();
for(int i=2;i<=n;i++)
{
if(dist[i]!=INF) fout << dist[i] << ' ';
else fout << 0 << ' ';
}
return 0;
}