Pagini recente » Cod sursa (job #3368124) | Cod sursa (job #3368148) | Cod sursa (job #3368145) | Cod sursa (job #3368089) | Cod sursa (job #3368073)
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
int n, m, s;
vector<int> lis[100005];
int dist[100005];
int main() {
fin >> n >> m >> s;
for (int i = 0; i < m; i++) {
int x, y;
fin >> x >> y;
lis[x].push_back(y);
}
for (int i = 1; i <= n; i++)
dist[i] = -1;
queue<int> q;
dist[s] = 0;
q.push(s);
while (!q.empty()) {
int x = q.front();
q.pop();
for (int y : lis[x])
if (dist[y] == -1) {
dist[y] = dist[x] + 1;
q.push(y);
}
}
for (int i = 1; i <= n; i++)
fout << dist[i] << " ";
fout << "\n";
return 0;
}