Pagini recente » Cod sursa (job #2553090) | Cod sursa (job #1151295) | Cod sursa (job #420052) | Cod sursa (job #1657488) | Cod sursa (job #2299524)
#include <fstream>
#include <queue>
#include <vector>
using namespace std;
ifstream in("dijkstra.in");
ofstream out("dijkstra.out");
const int NMAX = 50001;
const int oo = (1 << 30);
int n, m, D[NMAX];
bool inCoada[NMAX];
vector < pair <int, int> > G[NMAX];
struct comparaDistante
{
bool operator()(int x, int y)
{
return D[x] > D[y];
}
};
priority_queue < int, vector < int >, comparaDistante > coada;
void citire()
{
int x, y, c;
in >> n >> m;
for (int i = 1; i <= m; ++i)
{
in >> x >> y >> c;
G[x].push_back(make_pair(y, c));
}
}
void dijkstra(int nodStart)
{
int nodCurent, vecin, cost;
for (int i = 1; i <= n; ++i)
D[i] = oo;
D[nodStart] = 0;
coada.push(nodStart);
inCoada[nodStart] = 1;
while (!coada.empty())
{
nodCurent = coada.top();
coada.pop();
inCoada[nodCurent] = 0;
for (size_t i = 0; i < G[nodCurent].size(); ++i)
{
vecin = G[nodCurent][i].first;
cost = G[nodCurent][i].second;
if (D[nodCurent] + cost < D[vecin])
{
D[vecin] = D[nodCurent] + cost;
if (inCoada[vecin] == 0)
{
coada.push(vecin);
inCoada[vecin] = 1;
}
}
}
}
}
void afisare()
{
for (int i = 2; i <= n; ++i)
{
if (D[i] != oo)
out << D[i] << " ";
else
out << 0 << " ";
}
}
int main()
{
citire();
dijkstra(1);
afisare();
return 0;
}