Mai intai trebuie sa te autentifici.
Cod sursa(job #2175686)
Utilizator | Data | 16 martie 2018 18:26:33 | |
---|---|---|---|
Problema | Algoritmul lui Dijkstra | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.92 kb |
#include <bits/stdc++.h>
#define INF 0x3f3f3f3f
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector<pair<int,int>> v[50001];
priority_queue<pair<int,int>> t;
int n,m,a,b,c,d[50001],viz[50001];
int main()
{
fin>>n>>m;
for (int i=1;i<=m;i++)
{
fin>>a>>b>>c;
v[a].push_back({b,c});
}
for (int i=2;i<=m;i++)
d[i]=INF;
t.push({0,1});
while (!t.empty())
{
auto p=t.top();
t.pop();
if (!viz[p.second])
{
viz[p.second]=1;
for (auto vec: v[p.second])
if (!viz[vec.first])
{
if (d[vec.first]>d[p.second]+vec.second)
d[vec.first]=d[p.second]+vec.second;
t.push({-d[vec.first], vec.first});
}
}
}
for (int i=2;i<=n;i++)
fout<<d[i]<<" ";
return 0;
}