Nu aveti permisiuni pentru a descarca fisierul grader_test21.in
Cod sursa(job #2477896)
Utilizator | Data | 21 octombrie 2019 11:54:36 | |
---|---|---|---|
Problema | Algoritmul lui Dijkstra | Scor | 20 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 1.08 kb |
#include<bits/stdc++.h>
#define INF 1 << 30
#define M 50003
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int n,m,dist[M];
vector<pair <int,int> >lista[M];
priority_queue<pair <int,int> >q;
bool viz[M];
void dijkstra()
{
for(int i=1;i<=n;i++)
dist[i]=INF;
q.push({0,1});
dist[1]=0;
while(!q.empty())
{
int u=q.top().second;
q.pop();
if(viz[u]==true)
continue;
viz[u]=true;
for(auto x:lista[u])
{
int nod=x.second;
int d=x.first;
if(dist[u]+d<dist[nod])
{
dist[nod]=dist[u]+d;
q.push({dist[nod],nod});
}
}
}
}
int main()
{
fin>>n>>m;
for(int i=1;i<=m;i++)
{
int a,b,d;
fin>>a>>b>>d;
lista[a].push_back({d,b});
}
dijkstra();
for(int i=2;i<=n;i++)
{
if(viz[i])
fout<<dist[i]<<' ';
else
fout<<0<<' ';
}
return 0;
}