Pagini recente » Cod sursa (job #2067502) | Cod sursa (job #2372592) | Cod sursa (job #1006982) | Cod sursa (job #1701992) | Cod sursa (job #1740482)
#include <fstream>
#include <vector>
#include <queue>
#define maxn 100005
using namespace std;
int n, m, s;
vector<int> a[maxn];
queue<int> q;
bool seen[maxn];
int d[maxn];
void bfs(int s) {
q.push(s);
seen[s] = true;
d[s] = 0;
while (!q.empty()) {
int currentNode = q.front();
q.pop();
for (int i = 0; i < a[currentNode].size(); i++) {
if (!seen[a[currentNode][i]]) {
d[a[currentNode][i]] = d[currentNode] + 1;
q.push(a[currentNode][i]);
seen[a[currentNode][i]] = true;
}
}
}
}
int main() {
ifstream in("bfs.in");
ofstream out("bfs.out");
int x, y;
in >> n >> m >> s;
for (int i = 0; i < m; i++) {
in >> x >> y;
a[x].push_back(y);
}
bfs(s);
for (int i = 1; i <= n; i++) {
if (d[i] == 0) {
if (i != s)
out << "-1 ";
else
out << "0 ";
} else
out << d[i] << " ";
}
return 0;
}