Pagini recente » Cod sursa (job #1321085) | Cod sursa (job #2129940) | Cod sursa (job #2052095) | Cod sursa (job #1104037) | Cod sursa (job #1848514)
#include <fstream>
#include <vector>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
vector <int> V[100005];
int n, m, s, i, x, y;
int F[100005], D[100005];
void BFS(int x, int pas)
{
int i, y;
for (i=0; i<V[x].size(); i++)
{
y=V[x][i];
if (F[y]==0)
{
D[y]=pas;
F[y]=1;
BFS(y, pas+1);
}
}
}
int main()
{
int i;
fin>>n>>m>>s;
for (i=1; i<=m; i++)
{
fin>>x>>y;
V[x].push_back(y);
}
F[s]=1;
for (i=1; i<=n; i++)
D[i]=-1;
D[s]=0;
BFS(s, 1);
for (i=1; i<=n; i++)
fout<<D[i]<<" ";
return 0;
}