Pagini recente » Cod sursa (job #2344042) | Cod sursa (job #1348588) | Cod sursa (job #2504864) | Cod sursa (job #3211869) | Cod sursa (job #1969988)
#include <iostream>
#include <fstream>
#include <vector>
#include <bitset>
#include <queue>
using namespace std;
ifstream fin ("dijkstra.in");
ofstream fout ("dijkstra.out");
const int maxn = 5e4 + 5;
const int maxm = 25e4 + 5;
const int oo = 1 << 30;
vector <pair <int,int> > G[maxn];
int Dist[maxn];
int n, m;
void Dijkstra(int start) {
priority_queue <pair <int,int> > H;
bitset <maxn> Vis = 0;
for (int i = 1; i <= n; i++) {
Dist[i] = oo;
}
Dist[start] = 0;
H.push(make_pair(0, start));
while (!H.empty()) {
int node = H.top().second;
H.pop();
if (Vis[node] == true) continue;
Vis[node] = true;
for (auto &it : G[node]) {
if (Dist[it.first] > Dist[node] + it.second) {
Dist[it.first] = Dist[node] + it.second;
H.push(make_pair(-Dist[it.first], it.first));
}
}
}
}
int main() {
ios_base :: sync_with_stdio(false);
fin >> n >> m;
for (int i = 1; i <= m; i++) {
int x, y, c;
fin >> x >> y >> c;
G[x].push_back(make_pair(y, c));
}
Dijkstra(1);
for (int i = 2; i <= n; i++) {
if (Dist[i] == oo) Dist[i] = 0;
fout << Dist[i] << " ";
}
fout << "\n";
return 0;
}