Pagini recente » Cod sursa (job #1360307) | Cod sursa (job #338132) | Cod sursa (job #31910) | Cod sursa (job #901558) | Cod sursa (job #1865018)
#include <iostream>
#include <fstream>
#include <queue>
#include <vector>
#include <utility>
#define NMAX 50005
#define inf 1000000000
using namespace std;
ifstream fin ("dijkstra.in");
ofstream fout ("dijkstra.out");
int n, m;
vector < pair <int, int> > nodes[NMAX];
priority_queue < pair <int, int> > PQ;
int dist[NMAX];
bool viz[NMAX];
int main ()
{
fin >> n >> m;
int a, b, c;
for (int i = 1; i <= m; ++i) {
fin >> a >> b >> c;
nodes[a].push_back(make_pair(b,c));
}
dist[1] = 0;
for (int i = 2; i <= n; ++i) {
dist[i] = inf;
}
PQ.push(make_pair(0, 1)); // prima oara distanta
while (PQ.size()) {
pair <int, int> aux = PQ.top();
PQ.pop();
int node = aux.second;
if (viz[node]) {
continue;
}
viz[node] = 1;
for (int i = 0; i < nodes[node].size(); ++i) {
if (dist[node] + nodes[node][i].second < dist[nodes[node][i].first]) {
dist[nodes[node][i].first] = dist[node] + nodes[node][i].second;
PQ.push(make_pair(-dist[nodes[node][i].first], nodes[node][i].first));
}
}
}
for (int i = 2; i <= n; ++i) {
if (dist[i] == inf) {
dist[i] = 0;
}
fout << dist[i] << " ";
}
fout << '\n';
return 0;
}