Pagini recente » Cod sursa (job #2342718) | Cod sursa (job #835613) | Cod sursa (job #1337877) | Cod sursa (job #616228) | Cod sursa (job #2528694)
#include <iostream>
#include <vector>
#include <fstream>
#include <queue>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
const int oo = (1 << 30);
int nodes, edges, k, d[250000];
bool in_q[250000];
vector< pair<int, int> > gr[250000];
queue<int> q;
void citire() {
fin >> nodes >> edges;
for (int i = 0; i < edges; i++) {
int x, y, val;
fin >> x >> y >> val;
gr[x].push_back(make_pair(y, val));
}
}
void dijkstra(int nodStart) {
for (int i = 1; i <= nodes; i++)
d[i] = oo;
d[nodStart] = 0;
q.push(nodStart);
in_q[nodStart] = true;
while (!q.empty()) {
int nodCurent = q.front();
q.pop();
in_q[nodCurent] = false;
for (int i = 0; i < gr[nodCurent].size(); i++) {
int vecin = gr[nodCurent][i].first;
int cost = gr[nodCurent][i].second;
if (d[nodCurent] + cost < d[vecin]) {
d[vecin] = cost + d[nodCurent];
if (in_q[vecin] == false) {
q.push(vecin);
in_q[vecin] = true;
}
}
}
}
}
void afisare() {
for (int i = 2; i <= nodes; i++) {
if (d[i] != oo)
fout << d[i] << " ";
else
fout << 0 << " ";
}
}
int main(int argc, const char * argv[]) {
citire();
dijkstra(1);
afisare();
}