Mai intai trebuie sa te autentifici.
Cod sursa(job #2610173)
Utilizator | Data | 4 mai 2020 16:12:00 | |
---|---|---|---|
Problema | BFS - Parcurgere in latime | Scor | 0 |
Compilator | cpp-32 | Status | done |
Runda | Arhiva educationala | Marime | 1.36 kb |
#include <bits/stdc++.h>
using namespace std;
#define NMAX 100001
class Task {
public:
void solve() {
read_input();
get_result();
print_output();
}
private:
int n, m, source;
vector<int> lista_vecini[NMAX];
vector<int> dist[NMAX];
void read_input() {
ifstream in("bfs.in");
in >> n >> m >> source;
for (int i = 1; i <= m; ++i) {
int x, y;
in >> x >> y;
lista_vecini[x].push_back(y);
}
in.close();
}
void get_result() {
queue<int> q;
for (int i = 1; i <= n; ++i) {
dist[i] = -1;
}
q.push(source);
dist[source] = 0;
while (!q.empty()) {
int nod = q.front();
q.pop();
for (auto vecin : lista_vecini[nod]) {
if (dist[vecin] == -1) {
dist[vecin] = d[nod] + 1;
q.push(vecin);
}
}
}
}
void print_output() {
ofstream out("bfs.out");
for (int i = 1; i < n; ++i) {
out << dist[i] << " ";
}
out << dist[n] << "\n";
out.close();
}
};
int main() {
Task *task = new Task();
task->solve();
delete task;
return 0;
}