Pagini recente » Cod sursa (job #299915) | Cod sursa (job #2126386) | Cod sursa (job #2095967) | Cod sursa (job #880245) | Cod sursa (job #1475471)
#include <cstdio>
#include <vector>
#include <queue>
using namespace std;
int n, m, source;
const int NMAX = 100505;
const int INF = 0x3f3f3f3f;
vector<int> G[NMAX];
queue<int> Q;
void read() {
scanf("%d%d%d", &n, &m, &source);
int x, y;
for (int i = 1; i <= m; i++) {
scanf("%d%d", &x, &y);
G[x].push_back(y);
}
}
void solve() {
Q.push(source);
vector<int> D(n + 1, INF);
D[source] = 0;
while (!Q.empty()) {
int node = Q.front();
Q.pop();
for (auto it = G[node].begin(); it != G[node].end(); it++) {
if (D[*it] > D[node] + 1) {
D[*it] = D[node] + 1;
Q.push(*it);
}
}
}
for (int i = 1; i <= n; i++) {
if (i > 1) printf(" ");
printf("%d", D[i] == INF ? -1 : D[i]);
}
printf("\n");
}
int main() {
freopen("bfs.in", "r", stdin);
freopen("bfs.out", "w", stdout);
read();
solve();
return 0;
}