Nu aveti permisiuni pentru a descarca fisierul grader_test17.in
Cod sursa(job #3158821)
| Utilizator | Data | 19 octombrie 2023 21:06:24 | |
|---|---|---|---|
| Problema | Algoritmul lui Dijkstra | Scor | 0 |
| Compilator | cpp-64 | Status | done |
| Runda | Arhiva educationala | Marime | 1.03 kb |
#include <fstream>
#include <vector>
#include <queue>
#include <climits>
using namespace std;
const int Nmax = 50005;
int n, m;
vector<int> dist(Nmax, INT_MAX);
vector<pair<int, int>> L[Nmax];
priority_queue<pair<int, int>> Q;
void Dijkstra() {
Q.push({0, 1});
while(!Q.empty()) {
int nod = Q.top().second, dist_nod = -Q.top().first;
Q.pop();
if(dist_nod > dist[nod]) {
continue;
}
for(pair<int, int> x : L[nod]) {
int vec = x.first;
if(dist[vec] > dist[nod] + x.second) {
dist[vec] = dist[nod] + x.second;
Q.push({-dist[vec], vec});
}
}
}
}
int main() {
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
fin >> n >> m;
for(int i = 1; i <= m; i++) {
int x, y, z;
fin >> x >> y >> z;
L[x].push_back({y, z});
}
Dijkstra();
for(int i = 2; i <= n; i++) {
fout << dist[i] << " ";
}
return 0;
}
