Pagini recente » Cod sursa (job #519863) | Cod sursa (job #2016524) | Monitorul de evaluare | Cod sursa (job #2570101) | Cod sursa (job #1978200)
#include <iostream>
#include <fstream>
#include <queue>
#include <vector>
using namespace std;
ifstream in("bfs.in");
ofstream out("bfs.out");
#define pb push_back
const int NMax = 1e5 + 5;
const int inf = 1e9 + 5;
int N,M,S;
bool vis[NMax];
int dist[NMax];
vector<int> v[NMax];
int main() {
in>>N>>M>>S;
while (M--) {
int x,y;
in>>x>>y;
v[x].pb(y);
}
for (int i=1;i <= N;++i) {
dist[i] = inf;
}
dist[S] = 0;
vis[S] = 1;
queue<int> Q;
Q.push(S);
while (Q.size()) {
int node = Q.front();
Q.pop();
for (auto nxt : v[node]) {
if (dist[nxt] > dist[node] + 1) {
dist[nxt] = dist[node] + 1;
vis[nxt] = true;
Q.push(nxt);
}
}
}
for (int i=1;i <= N;++i) {
out<<( (dist[i] == inf) ? -1 : dist[i] )<<' ';
}
in.close();
out.close();
return 0;
}