Pagini recente » Cod sursa (job #3205315) | Cod sursa (job #2748604) | Cod sursa (job #2423463) | Cod sursa (job #3153850) | Cod sursa (job #2691906)
#include <bits/stdc++.h>
using namespace std;
const int NMAX = 1000;
vector <int> adiacenta[NMAX];
int tata[NMAX];
bool vizitat[NMAX];
int dist[NMAX];
int main()
{
ifstream in("bfs.in");
ofstream out("bfs.out");
int n, m, s;
in >> n >> m >> s;
for (int i = 0; i < m; i++) {
int a, b;
in >> a >> b;
adiacenta[a].push_back(b);
}
queue <int> q;
q.push(s);
vizitat[s] = 1;
tata[s] = -1;
dist[s] = 0;
while (!q.empty()){
int nod = q.front();
q.pop();
for (int i = 0; i < (int)adiacenta[nod].size(); i++) {
int fiu = adiacenta[nod][i];
if (vizitat[fiu] == 0){
q.push(fiu);
tata[fiu] = nod;
vizitat[fiu] = 1;
dist[fiu] = dist[nod] + 1;
}
}
}
for (int i = 1; i <= n; i++) {
if (vizitat[i] == 0)
out << -1 << " ";
else
out << dist[i] << " ";
}
out << '\n';
return 0;
}