Mai intai trebuie sa te autentifici.
Cod sursa(job #2487425)
Utilizator | Data | 4 noiembrie 2019 19:20:46 | |
---|---|---|---|
Problema | Algoritmul lui Dijkstra | Scor | 90 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 1.14 kb |
//#include <iostream>
#include <bits/stdc++.h>
using namespace std;
ifstream in("dijkstra.in");
ofstream out("dijkstra.out");
const int Max=50005;
int n,m; int dist[Max];
vector <pair<int,int> >v[Max];
struct compara
{
bool operator()(int x,int y)
{
return dist[x]>dist[y];
}
};
priority_queue <int,vector<int>,compara>q;
void dijkstra(int x)
{
for(int i=1;i<=n;i++)
dist[i]=INT_MAX;
dist[x]=0;
q.push(x);
while(!q.empty())
{
int nod=q.top(); q.pop();
for(int j=0;j<v[nod].size();j++)
{
int vecin=v[nod][j].first;
int cost=v[nod][j].second;
if(dist[vecin]>dist[nod]+cost)
{
dist[vecin]=dist[nod]+cost;
q.push(vecin);
}
}
}
}
void citire()
{
in>>n>>m;
for(int i=1;i<=m;i++)
{
int x,y,c; in>>x>>y>>c;
v[x].push_back({y,c});
}
}
int main()
{
citire();
dijkstra(1);
for(int i=2;i<=n;i++)
if(dist[i]!=INT_MAX)
out<<dist[i]<<" ";
else
out<<0<<" ";
return 0;
}