Pagini recente » Cod sursa (job #2524567) | Cod sursa (job #2280229) | Cod sursa (job #394629) | Cod sursa (job #2643751) | Cod sursa (job #2117777)
#include <bits/stdc++.h>
#define in "dijkstra.in"
#define out "dijkstra.out"
#define oo 1e7
#define Nmax 50005
using namespace std;
ifstream fin(in);
ofstream fout(out);
int n,m;
bitset <Nmax> viz;
int d[Nmax];
vector <pair <int,int> > L[Nmax];
priority_queue <pair <int,int> > q;
void Read()
{
int i,x,y,cost;
fin >> n >> m;
for (i = 1; i <= m; i++)
{
fin >> x >> y >> cost;
L[x].push_back({y,cost});
}
fin.close();
}
void Init()
{
int i;
for (i = 1; i <= n; i++)
d[i] = oo;
q.push({0,1}); /// cost, nod
d[1] = 0;
}
void Dijkstra()
{
int nod,cost,k;
while (!q.empty())
{
k = q.top().second; /// preiau nodul
q.pop();
if (viz[k] == 0)
{
viz[k] = 1;
for (auto i : L[k])
{
nod = i.first;
cost = i.second;
if (d[nod] > d[k] + cost)
{
d[nod] = d[k] + cost;
q.push({-d[nod],nod});
}
}
}
}
}
void Afis()
{
int i;
for (i = 2; i <= n; i++)
if (d[i] != oo) fout << d[i] << " ";
else fout << "0 ";
fout.close();
}
int main()
{
Read();
Init();
Dijkstra();
Afis();
return 0;
}