Pagini recente » Cod sursa (job #2803993) | Cod sursa (job #250301) | Cod sursa (job #967316) | Cod sursa (job #565221) | Cod sursa (job #3212722)
#include <fstream>
#include <queue>
#include <vector>
#define INF 2e9
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
struct t_muchie {
int nod;
int cost;
bool operator<(const t_muchie& other) const {
return cost > other.cost;
}
};
const int MAX_N = 50001;
int main() {
int n, m;
vector<t_muchie> vecini[MAX_N];
int drum[MAX_N];
bool viz[MAX_N] = {0};
fin >> n >> m;
for (int i = 1; i <= m; i++) {
int nod1, nod2, cost;
fin >> nod1 >> nod2 >> cost;
t_muchie muchie = {nod2, cost};
vecini[nod1].push_back(muchie);
}
for (int i = 1; i <= n; i++) {
drum[i] = INF;
}
drum[1] = 0;
viz[1] = true;
priority_queue<pair<int, int> > pq;
pair p = {0, 1};
pq.push(p);
while (!pq.empty()) {
int nod_curr = pq.top().second;
pq.pop();
for (int i = 0; i < vecini[nod_curr].size(); i++) {
int vecin = vecini[nod_curr][i].nod;
int cost = vecini[nod_curr][i].cost;
if (!viz[vecin] && drum[vecin] > drum[nod_curr] + cost) {
viz[vecin] = true;
drum[vecin] = drum[nod_curr] + cost;
pair p_vecin = {-drum[vecin], vecin};
pq.push(p_vecin);
}
}
}
for (int i = 2; i <= n; i++) {
if (drum[i] == INF) {
fout << "0 ";
} else {
fout << drum[i] << ' ';
}
}
// for (int i = 1; i <= n; i++) {
// fout << i << ' ' << drum[i] << endl;
// }
return 0;
}